There were at least 194 contributions made to political candidates and committees by Argonne National Laboratory employees, 82.5 percent of which have gone to Democratic Party causes and candidates.
According to the Federal Elections Commission, donations made to political groups or candidates must be disclosed under state law for greater transparency in elections. In a study by opensecrets.org, they found the state with the highest percentage of contributions going to Democrats was Vermont with over 86-percent of the money going to Democratic candidates and committees. The most Republican-leaning state was Mississippi with over 71-percent of the money going to Republican candidates and committees.
Sandra Pessina's contributions
| Committee | Candidate | Party | Amount |
|---|---|---|---|
| Winred | - | Republican Party | $1,242 |
| Nrcc | Dan Newhouse | Republican Party | $440 |
Other donations by employees of Argonne National Laboratory
| Employee | Candidate | Party | Amount |
|---|---|---|---|
| Cyrus Adams | William G. Foster | Democratic Party | $9,600 |
| Marion M. White | Sean Casten | Democratic Party | $9,000 |
| Jim S. Kerby | William G. Foster | Democratic Party | $6,000 |
| Ting-Leung Sham | Joe Biden | Democratic Party | $5,600 |
| Ting-Leung Sham | Amy J. Klobuchar | Democratic Party | $5,500 |
| John G. Stevens | - | Democratic Party | $5,000 |
| Elizabeth Austin | - | Democratic Party | $5,000 |
| Robert Erck | Sean Casten | Democratic Party | $3,500 |
| John Stevens | Kamala D. Harris | Democratic Party | $3,500 |
| Robert Erck | Raja S. Krishnamoorthi | Democratic Party | $3,000 |
| James S. Kerby | Sean Casten | Democratic Party | $3,000 |
| Ian Foster | William G. Foster | Democratic Party | $3,000 |
| Elizabeth Austin | Theresa Greenfield | Democratic Party | $2,800 |
| Elizabeth Austin | Jaime Harrison | Democratic Party | $2,800 |
| Elizabeth Austin | Michael Espy | Democratic Party | $2,800 |
| David Underwood | - | $2,740 | |
| Stephen K. Streiffer | William G. Foster | Democratic Party | $2,500 |
| Cosmas Zachos | - | Democratic Party | $2,250 |
| Lisa Pocius | Andrew Yang | Democratic Party | $2,023 |
| Roy Benedek | - | Democratic Party | $2,000 |
| Robert Erck | Susie Lee | Democratic Party | $2,000 |
| Robert Erck | Betsy Dirksen Londrigan | Democratic Party | $2,000 |
| Robert Erck | Josh Harder | Democratic Party | $2,000 |
| Robert A. Erck | Marie Newman | Democratic Party | $2,000 |
| John Stevens | Joe Biden | Democratic Party | $2,000 |
| John G. Stevens | - | Democratic Party | $2,000 |
| Jim H. Norem | Sean Casten | Democratic Party | $2,000 |
| Dean Walters | - | Democratic Party | $1,532 |
| Robert Erck | Eva Putzova | Democratic Party | $1,500 |
| Robert Erck | Anthony Brindisi | Democratic Party | $1,500 |
| Robert A. Erck | William G. Foster | Democratic Party | $1,500 |
| John Stevens | Pete Buttigieg | Democratic Party | $1,500 |
| John G. Stevens | William G. Foster | Democratic Party | $1,500 |
| Nancy L. Grossman | William G. Foster | Democratic Party | $1,300 |
| Semyon Sorsher | - | Republican Party | $1,140 |
| Soenke Seifert | - | Republican Party | $1,100 |
| Renee Nault | - | Democratic Party | $1,088 |
| Ting-Leung Sham | Raja S. Krishnamoorthi | Democratic Party | $1,000 |
| Robert Erck | Helane Sawsan Seikaly | Democratic Party | $1,000 |
| Robert Erck | Joel David Funk | Democratic Party | $1,000 |
| Robert Erck | Hillary Scholten | Democratic Party | $1,000 |
| Robert Erck | Michael Siegel | Democratic Party | $1,000 |
| Robert Erck | Tedra Lynne Cobb | Democratic Party | $1,000 |
| Pierre Darancet | Katherine Porter | Democratic Party | $1,000 |
| Maria E. Curry-Nkansah | Lauren A. Underwood | Democratic Party | $1,000 |
| Larry Johnson | Jaime Harrison | Democratic Party | $1,000 |
| Larry A. Curtiss | Sean Casten | Democratic Party | $1,000 |
| John Tramm | Joe Biden | Democratic Party | $1,000 |
| John Stevens | Amy J. Klobuchar | Democratic Party | $1,000 |
| Ian Foster | Joe Biden | Democratic Party | $1,000 |
| Ian Foster | Sean Casten | Democratic Party | $1,000 |
| Elizabeth Moog | - | $1,000 | |
| Elizabeth Austin | Lauren A. Underwood | Democratic Party | $1,000 |
| Elizabeth Austin | Raja S. Krishnamoorthi | Democratic Party | $1,000 |
| Donald Geesaman | William G. Foster | Democratic Party | $1,000 |
| Ting-Leung Sham | Katherine Porter | Democratic Party | $950 |
| Pierre Darancet | Elizabeth Warren | Democratic Party | $950 |
| Peter Baldo | Sean Casten | Democratic Party | $950 |
| Joseph Listwan | - | Republican Party | $893 |
| Ting-Leung Sham | Cory A. Booker | Democratic Party | $750 |
| Roger Sersted | Pete Buttigieg | Democratic Party | $750 |
| Larry Curtiss | Joe Biden | Democratic Party | $750 |
| Edward Tanzman | Janice D. Schakowsky | Democratic Party | $700 |
| Corby Schmitz | Joe Biden | Democratic Party | $700 |
| Arlene Wagner | Cory A. Booker | Democratic Party | $700 |
| Andrea Manning | - | Republican Party | $677 |
| Jake Gruber | - | Republican Party | $675 |
| Ting-Leung Sham | Tammy L. Duckworth | Democratic Party | $600 |
| Ting-Leung Sham | Lauren A. Underwood | Democratic Party | $575 |
| Daniel Evans | Joe Biden | Democratic Party | $525 |
| Joseph Listwan | Jeanne Ives | Republican Party | $518 |
| Michael Becker | Joe Biden | Democratic Party | $514 |
| Stephen T. Pratt | Lauren A. Underwood | Democratic Party | $500 |
| Stephen T. Pratt | Bradley Scott Schneider | Democratic Party | $500 |
| Roger Blomquist | William G. Foster | Democratic Party | $500 |
| Robert Fischetti | Joe Biden | Democratic Party | $500 |
| Robert Erck | Mark Kelly | Democratic Party | $500 |
| Robert Erck | Lauren A. Underwood | Democratic Party | $500 |
| Robert Erck | Colin Allred | Democratic Party | $500 |
| Robert Erck | Devin D. Thorpe | Democratic Party | $500 |
| Robert Erck | Jamaal Bowman | Democratic Party | $500 |
| Richard Vondrasek | Joe Biden | Democratic Party | $500 |
| Pierre Darancet | Sean Casten | Democratic Party | $500 |
| Peter Baldo | Cory A. Booker | Democratic Party | $500 |
| Paul Fuoss | Elizabeth Warren | Democratic Party | $500 |
| Nicholas Jackson | Joe Biden | Democratic Party | $500 |
| Nancy L. Grossman | - | $500 | |
| Larry R. Johnson | William G. Foster | Democratic Party | $500 |
| Ken Lerner | - | Democratic Party | $500 |
| Kathy Macal | Joe Biden | Democratic Party | $500 |
| Kathryn Macal | Joe Biden | Democratic Party | $500 |
| John Stevens | John W. Hickenlooper | Democratic Party | $500 |
| John Stevens | Sara Gideon | Democratic Party | $500 |
| John Stevens | Cal Cunningham | Democratic Party | $500 |
| John Stevens | Theresa Greenfield | Democratic Party | $500 |
| John Stevens | - | $500 | |
| John G. Stevens | - | Democratic Party | $500 |
| Elizabeth Austin | - | $500 | |
| Elizabeth Austin | Betsy Dirksen Londrigan | Democratic Party | $500 |
| Ting-Leung Sham | Amy McGrath | Democratic Party | $450 |
| Michael Becker | William G. Foster | Democratic Party | $445 |
| Semyon Sorsher | Mitch McConnell | Republican Party | $436 |
| Patricia B. Weikersheimer | Sean Casten | Democratic Party | $425 |
| Jeffrey Guest | Gary Peters | Democratic Party | $410 |
| Walter Henning | William G. Foster | Democratic Party | $400 |
| Ting-Leung Sham | - | $400 | |
| Noah Paulson | Joe Biden | Democratic Party | $400 |
| Geoffrey T. Bodwin | William G. Foster | Democratic Party | $400 |
| Geoffrey Bodwin | Joe Biden | Democratic Party | $400 |
| Corby Schmitz | - | Democratic Party | $400 |
| Semyon Sorsher | - | Republican Party | $395 |
| Scott Izzo | - | Republican Party | $385 |
| Ken Teh | - | $375 | |
| Andre Mckenzie | - | Republican Party | $360 |
| Madonna Pence | Sean Casten | Democratic Party | $350 |
| Joshua Auld | Joe Biden | Democratic Party | $350 |
| John Stevens | - | $305 | |
| Tom Klosterman | Bernard Sanders | Democratic Party | $300 |
| Andre Mckenzie | - | Republican Party | $284 |
| John Mitchell | - | $275 | |
| Anand Bhattacharya | - | Democratic Party | $260 |
| Soenke Seifert | Donald Trump | Republican Party | $259 |
| Roger Blomquist | Jaime Harrison | Democratic Party | $250 |
| Robert E. Blair | - | Democratic Party | $250 |
| Peter Baldo | Steve Bullock | Democratic Party | $250 |
| Paulina Rychenkova | Joe Biden | Democratic Party | $250 |
| Mark Petri | - | Democratic Party | $250 |
| Marcy Rood | Sherrod Brown | Democratic Party | $250 |
| Marcy A. Rood | Betsy Dirksen Londrigan | Democratic Party | $250 |
| Khalil Amine | Joe Biden | Democratic Party | $250 |
| Karen Ehlers | Sean Casten | Democratic Party | $250 |
| John Stevens | - | $250 | |
| Ahren Jasper | Bernard Sanders | Democratic Party | $250 |
| Brian G. Stephenson | Joe Biden | Democratic Party | $225 |
| Andrew Stevens | Amy McGrath | Democratic Party | $225 |
| Larry Curtiss | Theresa Greenfield | Democratic Party | $207 |
| Ting-Leung Sham | Steve Bullock | Democratic Party | $200 |
| Karen Ehlers | - | $200 | |
| John Mitchell | Joe Biden | Democratic Party | $200 |
| Guy Jennings | Sean Casten | Democratic Party | $200 |
| Corrie Kamiya | Tammy L. Duckworth | Democratic Party | $200 |
| Arlene M. Wagner | Richard J. Durbin | Democratic Party | $200 |
| Larry Curtiss | Jaime Harrison | Democratic Party | $175 |
| Ting-Leung Sham | - | Democratic Party | $150 |
| Michael Becker | - | Democratic Party | $150 |
| Mary Westbrook | Amy McGrath | Democratic Party | $150 |
| Jessica Metcalfe | - | $150 | |
| Corrie Kamiya | Joe Biden | Democratic Party | $150 |
| Chris Jacobsen | Amy J. Klobuchar | Democratic Party | $150 |
| Wieslaw Prucnal | - | Democratic Party | $125 |
| Rohan Desai | Joe Biden | Democratic Party | $120 |
| Paul Hanke | Bernard Sanders | Democratic Party | $118 |
| Brian G. Stephenson | John W. Hickenlooper | Democratic Party | $115 |
| Joseph W. Strzalka | Bernard Sanders | Democratic Party | $107 |
| Joe Listwan | - | $104 | |
| Ting-Leung Sham | Theresa Greenfield | Democratic Party | $100 |
| Ting-Leung Sham | Tina Smith | Democratic Party | $100 |
| Ting-Leung Sham | Amy J. Klobuchar | Democratic Party | $100 |
| Richard Pardo | Joe Biden | Democratic Party | $100 |
| Michael Thackeray | Joe Biden | Democratic Party | $100 |
| Larry Curtiss | - | $100 | |
| Larry Curtiss | Cal Cunningham | Democratic Party | $100 |
| Jing-Jy Cheng | Andrew Yang | Democratic Party | $100 |
| Hoydoo You | - | Democratic Party | $100 |
| Guoyin Shen | Joe Biden | Democratic Party | $100 |
| David S. Mccallum | - | Democratic Party | $100 |
| Chris Jacobsen | Joe Biden | Democratic Party | $100 |
| Brian G. Stephenson | Richard J. Durbin | Democratic Party | $100 |
| Brian G. Stephenson | - | Democratic Party | $100 |
| Birger Back | - | Democratic Party | $100 |
| Arlene Wagner | Jonathan T. Ossoff | Democratic Party | $100 |
| Arlene Wagner | Joe Biden | Democratic Party | $100 |
| Arlene Wagner | Jaime Harrison | Democratic Party | $100 |
| Arlene M. Wagner | William G. Foster | Democratic Party | $100 |
| Andrew Stevens | Joe Biden | Democratic Party | $100 |
| David Mccallum | Sean Casten | Democratic Party | $96 |
| Robert Swale | - | Republican Party | $83 |
| Nils Heinonen | Bernard Sanders | Democratic Party | $78 |
| David Mccallum | Mark Kelly | Democratic Party | $71 |
| Larry Johnson | - | $55 | |
| Patricia B. Weikersheimer | Sean Casten | Democratic Party | $50 |
| Joseph W. Strzalka | Bernard Sanders | Independent | $48 |
| Larry Johnson | Joe Biden | Democratic Party | $40 |
| Jonathan Almer | - | $40 | |
| Nils Heinonen | Bernard Sanders | Democratic Party | $30 |
| Joseph Calvey | Bernard Sanders | Democratic Party | $27 |
| Arlene Wagner | Mark Kelly | Democratic Party | $20 |
| Branislav Brajuskovic | Tulsi Gabbard | Democratic Party | $19 |
| John Schneider | Joe Biden | Democratic Party | $12 |
| Brandon Sforzo | Bernard Sanders | Democratic Party | $10 |
| Vuk Brajuskovic | - | $4 |
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