House Judiciary Committee member Rep. Pramila Jayapal Pramila JayapalHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Bipartisan representatives demand answers on expired surveillance programs DHS opens probe into allegations at Georgia ICE facility MORE (D-Wash.) pushed back on panel Republican Matt Gaetz Matthew (Matt) GaetzSunday shows preview: Lawmakers prepare for SCOTUS confirmation hearings before election Trump faces tricky choice on Supreme Court pick Florida attorney general scrutinizing Bloomberg paying fines for felons to vote MORE's (Fla.) questioning of impeachment witnesses' donations to Democrats during Wednesday's impeachment inquiry hearing.

"You know who else has donated to Democrats? @RealDonaldTrump," Jayapal tweeted after Gaetz pressed the three witnesses invited by Democrats about their past donations.

Asked by the Florida Republican whether he donated to former President Obama, University of North Carolina law professor Michael Gerhardt said, "My family did, yes."

Stanford University law professor Pamela Karlan confirmed or did not contest that she has donated $1,000 to Sen. Elizabeth Warren (D-Mass.), $1,200 to former President Obama and $2,000 to former Secretary of State Hillary Clinton, who ran against President Trump in 2016.

The professors were part of a panel of three witnesses invited by Democrats and one invited by Republicans who testified about whether President Trump's dealings with Ukraine rose to the level of impeachment.