The Senate Intelligence Committee’s decision to subpoena 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 is putting a spotlight on a split within the GOP conference between it and another key panel investigating the 2016 election — the Senate Judiciary Committee.

The Intelligence Committee has long been seen as the last bipartisan investigation into the 2016 election on Capitol Hill. 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 (R-N.C.) and the panel’s ranking Democrat, Sen. Mark Warner Mark Robert WarnerDemocrats call for declassifying election threats after briefing by Trump officials It's time to upgrade benefits Intelligence chief says Congress will get some in-person election security briefings MORE (Va.), have worked closely together and generally avoided partisan fights.

News of the Trump Jr. subpoena provoked GOP criticism of Burr, with Warner coming to his defense.

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The Judiciary Committee has been seen as a more partisan panel, and its chairman, 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.), is now plotting an investigation into the handling of the Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE’s email probe and GOP concerns that the Obama-era FBI “spied” on Trump’s presidential campaign. Trump and his allies have accused the issue of being “swept under the rug.”

Graham, who took over the Judiciary Committee in January, distanced himself from the Trump Jr. subpoena, the first known instance of a subpoena directed toward one of the president’s children.

“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 told reporters.

Graham avoided any criticism of Burr but said of the investigation into Trump’s campaign, “For me, it’s over.”

The two panels engaged in a turf battle in the early days of the Trump administration, and have since traveled down different paths, with wildly different scopes of interest.

They initially locked horns over competing requests to hear from key figures such as former FBI Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE.

Sen. Chuck Grassley Charles (Chuck) Ernest GrassleyThe Hill's 12:30 Report: Ginsburg lies in repose Top GOP senators say Hunter Biden's work 'cast a shadow' over Obama Ukraine policy Read: Senate GOP's controversial Biden report MORE (R-Iowa), the Judiciary chairman from 2015 through 2018, kvetched at the time that his requests were being “stonewalled” after Comey declined to appear before his panel but testified publicly before Burr’s committee.

“We’ve each got a piece of this, but they’re all distinct,” said Sen. John Cornyn John CornynThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight Senate GOP faces pivotal moment on pick for Supreme Court MORE (R-Texas), who is one of two senators who serve on both the Judiciary and Intelligence committees.

Asked about the tension between the two panels during the previous Congress, he added, “I think there’s less now.”

The Senate Intelligence Committee is 28 months into its investigation of Russia’s election interference. Senators predict their report will go even further than 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 in detailing Moscow’s efforts to interfere in the presidential race.

“The primary goal of our endeavor is to look at how the intelligence community performed facing the threat from Russia, describe what the threat from Russia was and continues to be, and outline suggestions for how to posture against it and protect us in the future. That's our focus,” said Sen. Marco Rubio Marco Antonio RubioOvernight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Democrats step up hardball tactics as Supreme Court fight heats up Press: Notorious RBG vs Notorious GOP MORE (R-Fla.), a member of the panel.

Meanwhile, Graham is laying the groundwork for “investigating the investigators,” including the origins of the Obama-era FBI’s decision to open an investigation into the Trump campaign, the so-called Steele dossier and whether the FBI under Comey mishandled the Clinton investigation.

He’s being joined in his plans by Grassley and Sen. Ron Johnson Ronald (Ron) Harold JohnsonThe Hill's 12:30 Report: Ginsburg lies in repose CHC leaders urge Senate to oppose Chad Wolf nomination Top GOP senators say Hunter Biden's work 'cast a shadow' over Obama Ukraine policy MORE (R-Wis.), the chairman of the Homeland Security and Governmental Affairs Committee, who have requested a briefing from Attorney General William Barr Bill BarrHarris faces pivotal moment with Supreme Court battle Hillicon Valley: DOJ proposes tech liability shield reform to Congress | Treasury sanctions individuals, groups tied to Russian malign influence activities | House Republican introduces bill to set standards for self-driving cars McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE after he told lawmakers he was reviewing “spying” on the Trump campaign.

Grassley, during his time as Judiciary Committee chairman, sent a flurry of letters during the previous Congress pressing for information on the Steele dossier and Clinton’s email server after an effort to have a bipartisan investigation derailed amid differences with Democrats on the panel.

Graham sent new letters on Friday requesting Secretary of State Mike Pompeo Michael (Mike) Richard PompeoTreasury sanctions individuals, groups tied to Russian malign influence activities Navalny released from hospital after suspected poisoning Overnight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers MORE make a department employee, who allegedly spoke with former MI6 agent and dossier author Christopher Steele, available for an interview.

Both Graham and Burr vote with Trump more than 90 percent of the time, according to tracking by FiveThirtyEight. But in some ways, the two chairmen are opposites.

Burr is known for eschewing the press. He dodged reporters around the Capitol on Thursday, including escaping up a set of senators-only stairs after one pack followed him outside.

During the 2016 election, his campaign received in-state criticism for being cagey about his schedule.

Graham embraces the media. He frequently speaks with reporters as he walks from the Capitol basement to his office, stopping to give sound bites to TV cameras along the way.

Burr has said he won’t run for reelection in 2022, giving him more political freedom as he pursues his investigation. He’s also made a public point of avoiding meetings with Trump during the probe, stretching back to July 2017 when reporters noticed he was skipping a health care meeting at the White House.

Graham, by comparison, is up for reelection in 2020 and has aligned himself closely with the White House, including having Vice President Pence help kick off his campaign.

He dismissed a question earlier this year about whether his close ties to Trump made him too conflicted, telling a reporter, “You’ve got to be kidding.”

But Graham’s plans are rankling Democrats, who complain he is chasing conspiracy theories with his plan to relitigate Obama-era scandals.

Warner, speaking at a Christian Science Monitor breakfast, argued that even conservative members of the Senate Intelligence Committee aren’t leading the charge to “investigate the investigators” because they’ve “seen the evidence.”

“I think it's curious that the folks who are yelling the loudest about the origins of this investigation are generally folks who have the least information on this investigation,” he said.

Democrats on the Judiciary Committee are clamoring for Graham to bring Mueller before the Senate Judiciary Committee. Graham has asked Mueller if he wants to testify about any “misrepresentations” of a phone call he had with Barr but indicated otherwise that he’s ready to move on from the Russia probe.

Sen. Dick Durbin Richard (Dick) Joseph DurbinFeinstein 'surprised and taken aback' by suggestion she's not up for Supreme Court fight Grand jury charges no officers in Breonna Taylor death Democrats shoot down talk of expanding Supreme Court MORE (D-Ill.), the No. 2 Senate Democrat and a member of the Judiciary Committee, said Burr’s willingness to subpoena Trump Jr. underscored the differences between the two panels.

“It’s a sharp contrast here,” Durbin said, referring to the Judiciary and Intelligence committees. “I don’t understand Senator Graham’s position. Clearly Bob Mueller’s testimony would clarify a lot of things brought up in the Barr hearing. And I think that Lindsey’s making a big mistake.”