Sen. 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 he would be reluctant to submit 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 to further questioning from the Senate Intelligence Committee after the panel subpoenaed him in connection with its Russia investigation.

“I’m not his lawyer, so it’s up to him, but if I were his lawyer I’d be reluctant to put him back in this circus,” Graham, a staunch ally of 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, said on Capitol Hill Thursday.

The committee's subpoena was the first to a child of the president.

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Trump Jr. previously testified behind closed doors to both the House and Senate intelligence panels as well as the Senate Judiciary Committee, which Graham now chairs, in 2017.

Trump Jr. has said that he was “peripherally aware” of his father’s business interests in Russia, though the president’s former attorney Michael Cohen Michael Dean CohenJudge orders Eric Trump to comply with New York AG's subpoena before Election Day A huge deal for campaign disclosure: Trump's tax records for Biden's medical records Our Constitution is under attack by Attorney General William Barr MORE testified earlier this year that Trump Jr. was more involved in working to establish a Trump Tower in Moscow than his testimony indicated.

The Senate Intelligence Committee has been conducting its own investigation in parallel with special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE into Russian election interference in 2016.

Trump Jr. did not speak to the special counsel, who did not find sufficient evidence to prove that any Trump campaign associates conspired with the Russian government to meddle in the 2016 race.

A handful of Republicans have already slammed Senate Intelligence Committee Chairman Richard Burr Richard Mauze BurrRep. Mark Walker says he's been contacted about Liberty University vacancy Overnight Defense: Trump rejects major cut to military health care | Senate report says Trump campaign's Russia contacts posed 'grave' threat Senate report describes closer ties between 2016 Trump campaign, Russia MORE's (R-N.C.) decision to subpoena Trump Jr., saying Washington should move on from investigating Russian interference following the Mueller probe’s conclusion.

“The Mueller Report cleared @DonaldJTrumpJr and he’s already spent 27 hours testifying before Congress,” Sen Thom Tillis Thomas (Thom) Roland TillisThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting OVERNIGHT ENERGY: EPA head questions connection of climate change to natural disasters | Pebble Mine executives eye future expansion in recorded conversations | EPA questions science linking widely used pesticide to brain damage in children Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight MORE (R-N.C.), who is up for reelection in 2020, tweeted Thursday. “Dems have made it clear this is all about politics. It’s time to move on & start focusing on issues that matter to Americans.”

I agree with Leader McConnell: this case is closed. The Mueller Report cleared @DonaldJTrumpJr and he’s already spent 27 hours testifying before Congress. Dems have made it clear this is all about politics. It’s time to move on & start focusing on issues that matter to Americans. https://t.co/11THs9LE0j — Senator Thom Tillis (@SenThomTillis) May 9, 2019

"Apparently the Republican chair of the Senate Intel Committee didn’t get the memo from the Majority Leader that this case was closed...," Sen. Rand Paul Randal (Rand) Howard PaulRand Paul says he can't judge 'guilt or innocence' in Breonna Taylor case Overnight Health Care: Health officials tell public to trust in science | Despair at CDC under Trump influence | A new vaccine phase 3 trial starts Health officials tell public to trust in science MORE (R-Ky.) tweeted, referring to Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellFEC flags McConnell campaign over suspected accounting errors Poll: 59 percent think president elected in November should name next Supreme Court justice Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' MORE's speech this week declaring the "case closed" on Mueller's probe.

Apparently the Republican chair of the Senate Intel Committee didn’t get the memo from the Majority Leader that this case was closed... https://t.co/jvV5PIX266 — Senator Rand Paul (@RandPaul) May 8, 2019

Mueller did not find sufficient evidence to prove that any Trump campaign associates conspired with the Russian government to influence the 2016 race. Trump Jr. did not speak to the special counsel, but was mentioned in the report.

Updated at 1:02 p.m.