Graham: If I were Trump Jr.'s lawyer, 'I'd be reluctant to put him back in this circus'

Sen. Lindsey GrahamLindsey Olin GrahamGOP group calls on Republican senators to stand up to McConnell on election security in new ads Cindy McCain says no one in Republican Party carries 'voice of reason' after husband's death Trump says he'll decide on foreign aid cuts within a week MORE (R-S.C.) said he would be reluctant to submit Donald Trump Jr.Donald (Don) John TrumpPETA billboard in Baltimore calls Kushner a 'rich pest' Dick Cheney to attend fundraiser supporting Trump reelection: report House chairman warns foreign governments to 'cease and desist' spending money at Trump properties 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 TrumpDonald John Trump Former US ambassador: 'Denmark is not a big fan of Donald Trump and his politics' Senate Democrats push for arms control language in defense policy bill Detroit county sheriff endorses Booker for president 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 CohenMichael Dean CohenCapitol Police advised Gaetz against holding open events I'm not a Nazi, I'm just a dude: What it's like to be the other Steve King Wyden blasts FEC Republicans for blocking probe into NRA over possible Russia donations 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 MuellerRobert (Bob) Swan MuellerMueller report fades from political conversation Trump calls for probe of Obama book deal Democrats express private disappointment with Mueller testimony 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 BurrRichard Mauze BurrHoekstra emerges as favorite for top intelligence post Trump casts uncertainty over top intelligence role Trump withdraws Ratcliffe as Intelligence pick 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 TillisThomas (Thom) Roland TillisThe United States broken patent system is getting worse Gun reform groups to pressure GOP senators with rallies in all 50 states To cash in on innovation, remove market barriers for advanced energy technologies 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.”

"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 PaulRandal (Rand) Howard PaulGraham promises ObamaCare repeal if Trump, Republicans win in 2020 Conservatives buck Trump over worries of 'socialist' drug pricing Rand Paul to 'limit' August activities due to health MORE (R-Ky.) tweeted, referring to Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellGOP group calls on Republican senators to stand up to McConnell on election security in new ads The Hill's Morning Report - Trump hews to NRA on guns and eyes lower taxes Hobbled NRA shows strength with Trump MORE's speech this week declaring the "case closed" on Mueller's probe.

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.