Senate Judiciary Committee Chairman Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.) said Monday that President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's son Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE should comply with a Senate Intelligence Committee subpoena but refuse to answer the panel's questions.

“You just show up and plead the Fifth and it’s over with,” Graham told reporters, referring to the amendment that protects citizens from self-incrimination, according to The Washington Post.

ADVERTISEMENT

He added that Trump Jr.'s lawyer would “have to be an idiot” to allow him to testify before the committee again.

Graham had said a day earlier on Fox News that Trump Jr. should simply ignore the summons.

The comments from the senator came less than a week after the GOP-led Senate Intelligence Committee subpoenaed Trump Jr. to testify about his communication with Russian officials.

Reuters reported that the senators on the panel want to question him about testimony he gave to the Senate Judiciary Committee in September 2017 as part of its probe into Russia's interference in the 2016 presidential election.

According to a transcript released by the committee, Trump Jr. said he was “peripherally aware” of plans to expand his father’s businesses into Russia. But Trump’s former lawyer Michael Cohen testified before Congress in February that Trump Jr. was far more involved than that in talks to build a Trump Tower in Moscow.

Cohen said that he briefed Trump Jr. and Ivanka Trump, the president's elder daughter, about 10 times about the project.

Cohen pleaded guilty last year to lying to Congress about plans to build a Trump Tower in Moscow.

Trump Jr. privately testified before the House and Senate intelligence committees in 2017.

Sen. Richard Blumenthal (D-Conn.) ripped Graham's Sunday comments about ignoring the subpoena, saying on CNN that "suggesting that Donald Trump Jr. is above the law strikes me as unfounded and contrary to the positions that he took on Richard Nixon and on Bill Clinton William (Bill) Jefferson ClintonEpstein podcast host says he affiliated with elites from 'both sides of the aisle' Ruth Bader Ginsburg lies in repose at Supreme Court Business groups start gaming out a Biden administration MORE and others where he has argued that the law applies to everyone and that’s the ruling of the United States Supreme Court."

Multiple GOP senators have criticized the Senate Intelligence Committee, which is chaired by Sen. Richard Burr (R-N.C.), since the subpoena was issued.

“The Mueller Report cleared @DonaldJTrumpJr and he’s already spent 27 hours testifying before Congress,” Sen. Thom Tillis (R-N.C.), who is up for reelection in 2020, tweeted last week. “Dems have made it clear this is all about politics. It’s time to move on & start focusing on issues that matter to Americans.”

Sen. Mark Warner (Va.), the top Democrat on the Intelligence Committee, said last week that the panel has been clear that it reserves the “right to bring witnesses back if we have additional questions or there’s inconsistencies.” He did not comment on why the subpoena was issued.