The suit against Trump was filed Wednesday in federal district court in Washington, D.C. The lead plaintiff in the Senate was Richard Blumenthal (D-Conn.), while Michigan Democrat John Conyers Jr. led the effort in the House.
"Trump has conflicts of interest in at least 25 countries, and it appears he’s using his presidency to maximize his profits," Conyers told Reuters Wednesday.
Conspicuously missing from the long list of plaintiffs was California's senior senator, Dianne Feinstein. At a town hall meeting in San Francisco earlier this year, Feinstein mentioned the efforts of Sen. Blumenthal to take up a financial collection among Democrats willing to pay for the legal action.
Feinstein's office did not respond to questions from KQED Monday about the status of the lawsuit, two days before it was filed.
In an email to KQED from her office Wednesday morning, the senator's spokesman, Tom Mentzer, said: "As lead Democrat on one of the two Senate committees investigating the president, Senator Feinstein decided joining the lawsuit at this time may create an appearance of bias and undermine the integrity of the investigation. The senator will continue to be a vocal opponent of the president's illegal acceptance of foreign payments and benefits."
Sen. Harris, who joined the lawsuit, also serves on the Senate Intelligence Committee with Feinstein. Six other Democrats who serve with Feinstein on the Senate Judiciary Committee, including Illinois Sen. Richard Durbin, who is the Democratic whip and the second-highest-ranking Democrat in the Senate, are also plaintiffs in the lawsuit.
Feinstein is up for re-election next year and while she has indicated she will be a candidate, there have been grumblings on the left that the state's senior senator has not opposed Trump's agenda forcefully enough.
Seven other House Democrats from California were not listed as plaintiffs. They include Ami Bera, who narrowly won his election and re-elections, Jim Costa (Fresno), Tony Cardenas (San Fernando Valley), Norma Torres (Pomona), Raul Ruiz (Palm Desert), Lou Correa (Santa Ana) and the newly elected Jimmy Gomez from Los Angeles.
Note: This story was updated to correct the erroneous inclusion of Rep. Nanette Barragan in the list of Democrats who did not join the lawsuit. In fact Rep. Barragan is a plaintiff.