Democrats on the Senate Judiciary Committee are urging Chairman Lindsey Graham Lindsey Olin GrahamLincoln Project mocks Lindsey Graham's fundraising lag with Sarah McLachlan-themed video The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election Trump dumbfounds GOP with latest unforced error MORE (R-S.C.) to investigate a whistleblower complaint reportedly about a phone call made by President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE.

The 10 Democrats on the panel, led by Sen. Dianne Feinstein Dianne Emiel FeinsteinTrump plans to pick Amy Coney Barrett to replace Ginsburg on court Trump faces tricky choice on Supreme Court pick The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' MORE (Calif.), sent a letter to Graham on Tuesday requesting a hearing with Attorney General William Barr Bill BarrFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Why a backdoor to encrypted data is detrimental to cybersecurity and data integrity FBI official who worked with Mueller raised doubts about Russia investigation MORE, a copy of the complaint and any Justice Department guidance on the document.

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“The possible abuse of presidential authority and the obstruction of congressional oversight are matters that fall squarely within the Judiciary Committee’s jurisdiction,” the Democratic senators wrote.

“We have a constitutional responsibility to determine the reasons for the whistleblower’s report and why it is being withheld from Congress," they added. "Specifically, this Committee should use compulsory process as needed to obtain witnesses’ testimony and relevant documents."

The push for the Senate Judiciary Committee to help investigate the complaint comes as the Senate Intelligence Committee is expected to be briefed Thursday by the intelligence community inspector general and the acting director of national intelligence.

Lawmakers have been clamoring to see the whistleblower complaint amid news reports that Trump and his personal lawyer, Rudy Giuliani Rudy GiulianiThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting CIA found Putin 'probably directing' campaign against Biden: report Democrats fear Russia interference could spoil bid to retake Senate MORE, tried to pressure Ukraine to investigate former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE or his son, Hunter Biden.

The administration has refused calls to hand over the complaint.

“We therefore ask that you convene hearings to address the facts underlying the whistleblower’s report, the Administration’s refusal to provide that report to Congress in contravention of the law, and any legal advice provided by the Department of Justice or the White House Counsel on these matters,” the Judiciary Committee Democrats wrote in their letter.