Twenty Democrats on the House Foreign Affairs Committee are urging Chairman Ed Royce (R-Calif.) to call President Trump’s former national security adviser, Michael Flynn, to testify before the panel.

“We believe General Flynn must appear before the Committee, under oath as soon as possible,” they wrote Tuesday in a letter released Wednesday.

“General Flynn’s resignation leaves many unanswered questions about his and President Trump’s ties to Russia and whether America’s national security and intelligence operations have been compromised,” they added.

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“Our country’s national security, independence, and democratic institutions are at stake. As the body within the House with jurisdiction over U.S. foreign policy, we would be negligent if we left the questions about this incident unanswered.”

Wednesday’s letter was signed by Democratic Reps. David Cicilline (R.I.), Brad Sherman (Calif.), Gregory Meeks (N.Y.), Albio Sires (N.J.), Gerald Connolly (Va.), Theodore Deutch (Fla.), Karen Bass Karen Ruth BassBogeymen of the far left deserve a place in any Biden administration Lawmakers of color blast Trump administration for reportedly instructing agencies to end anti-bias training Kenosha mayor prefers Trump not visit 'at this point in time' MORE (Calif.), William Keating (Mass.), Ami Bera Amerish (Ami) Babulal BeraThe Hill's Coronavirus Report: iBIO Chairman and CEO Thomas Isett says developing a safe vaccine is paramount; US surpasses 150,000 coronavirus deaths with roughy one death per minute Democrats fear US already lost COVID-19 battle Karen Bass's star rises after leading police reform push MORE (Calif.), Lois Frankel Lois Jane FrankelShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' Florida Democrat introduces bill to recognize Puerto Rico statehood referendum Hillicon Valley: Democrats demand answers over Russian interference bulletin | Google Cloud wins defense contract for cancer research | Cyberattack disrupts virtual classes MORE (Fla.), Joaquín Castro (Texas), Robin Kelly (Ill.), Brendan Boyle (Pa.), Dina Titus (Nev.), Norma Torres (Calif.), Thomas Suozzi (N.Y.), Adriano Espaillat (N.Y.), Ted Lieu (Calif.), Bradley Schneider (Ill.) and Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (Hawaii).

Flynn resigned Monday amid reports that he misled senior White House officials about his phone conversations with Russian Ambassador Sergey Kislyak in December.

The retired Army lieutenant general said he “inadvertently” gave “incomplete information” about the talks to Vice President Pence and others.

Flynn’s resignation followed reports last week that, despite denials, he and Kislyak spoke about U.S. sanctions against Russia before Trump’s inauguration.

White House press secretary Sean Spicer said Tuesday that Trump asked for Flynn’s resignation once the president’s trust in his adviser “eroded.”

Reports emerged later Tuesday that several of Trump's top campaign aides were repeatedly in touch with senior Russian intelligence officials, according to intercepted phone calls and phone records.

Current and former U.S. officials told The New York Times that they had seen no evidence of collusion related to the hacking of Democratic organizations or the 2016 race, or if the talks centered on Trump himself.