On March 20, 2020, Common Cause filed complaints with the Senate Select Committee on Ethics, Securities and Exchange Commission and Department of Justice calling for investigations of Senators Richard Burr, Kelly Loeffler, James Inhofe and Dianne Feinstein to determine whether the Senators violated the Stop Trading on Congressional Knowledge Act of 2012 (STOCK Act), the Securities Exchange Act, the U.S. Criminal Code and other federal laws and regulations regarding stock trading applicable to Members of Congress. Specifically, Common Cause requested an investigation of whether these Senators engaged in illegal insider trading by trading stocks based on material, nonpublic information regarding the COVID-19 coronavirus pandemic received in private, confidential briefings for Senators by officials from the Centers for Disease Control and Prevention, the National Institute of Allergy and Infectious Diseases and other government officials.

On January 22, 2020, Common Cause filed a complaint with the Federal Election Commission (FEC) alleging reason to believe that Our Revolution, a nonprofit political organization established by Sen. Bernie Sanders (I-VT) in 2016 and now supporting his 2020 presidential campaign, violated the federal ‘soft money’ ban. The complaint documents that Our Revolution has solicited contributions explicitly to elect Sanders president, received contributions far in excess of the applicable $5,000 contribution limit and spent funds in connection with federal elections, including current voter mobilization efforts supporting Sanders in Iowa.

On September 23, 2019, Common Cause filed a complaint with the U.S. Department of Justice (DOJ) and the Federal Election Commission (FEC) alleging that President Donald Trump, his personal attorney Rudy Giuliani, and other political operatives illegally solicited a political contribution from a foreign national—by urging Ukrainian President Volodymyr Zelensky and other Ukrainian officials to investigate Hunter Biden and 2020 presidential candidate Joe Biden.

On August 2, 2019, Common Cause filed complaints with the Department of Justice (DOJ) and the Federal Election Commission (FEC) alleging reason to believe that solicitations for campaign contributions to former Kansas Secretary of State Kris Kobach’s Senate campaign distributed by We Build the Wall, Inc. violated multiple campaign finance laws. The email solicitation appears to violate the ban on corporate contributions to a federal candidate and the prohibition on candidates spending “soft money” in connection with their election. The email also lacks the “paid for by” disclaimer required by federal law when candidates solicit political contributions. 

On July 10, 2017, Common Cause filed a complaint with the U.S. Department of Justice (DOJ) and the Federal Election Commission (FEC) alleging that Donald Trump Jr., in his role with the Trump campaign, illegally solicited a political contribution from a foreign national—in the form of opposition research information he believed would be damaging to the Hillary Clinton campaign. Trump Jr. admitted to The New York Times that on June 9, 2016, he met with Natalia Veselnitskaya, a Kremlin-connected Russian lawyer who had promised him “damaging information about Hillary Clinton.” By that time his father had already secured the Republican nomination for President and Trump campaign chairman Paul J. Manfort also attended the meeting at Trump Tower as did Trump son-in-law Jared Kushner. Trump Jr. issued the statement to say that he had not in fact obtained the promised information but instead had been misled and lobbied on specific U.S.-Russian foreign policy issues. Nonetheless Trump Jr.’s meeting constitutes an illegal solicitation of a foreign national “contribution” by him and the Trump campaign. Federal campaign finance law defines “contribution” to include anything of value given for the purpose of influencing a federal election. And federal law prohibits any person from soliciting or receiving a contribution from a foreign national. On July 13, 2017, together with the Campaign Legal Center and Democracy 21 amended and expanded its July 10 complaint, adding more facts and alleged violations. On April 30, 2019, Common Cause, the Campaign Legal Center and Democracy 21 filed a supplement to its 2017 complaint with the FEC, to include new facts and legal analysis from Special Counsel Mueller's report on Russian interference in the 2016 presidential election. Mueller's report underscores the validity of the allegations made in 2017 by Common Cause, the Campaign Legal Center and Democracy 21.