Sen. Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE (R-Iowa) is inviting Donald Trump Jr. to publicly testify before the Senate Judiciary Committee about his meeting with a Russian lawyer offering compromising information on Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE, according to multiple reports.

Grassley will send Trump Jr. a letter on Thursday asking him to appear before the committee, according to CNN.

GRASSLEY tells me they are writing a letter to Donald Trump Jr. today requesting him to testify before the Senate Judiciary Committee — Manu Raju (@mkraju) July 13, 2017

The Associated Press also reported the development.

WASHINGTON (AP) _ Senate Judiciary Committee chairman says he is asking Donald Trump Jr. to testify; will subpoena if necessary. — Ken Thomas (@KThomasDC) July 13, 2017

A spokesman for the Judiciary Committee chairman did not immediately respond to a request for comment on the letter. It would mark the first formal, public invitation for President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE's eldest son to meet with lawmakers, who have been clamoring to hear from him about his June 2016 meeting with Russian lawyer Natalia Veselnitskaya.

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Trump Jr. was told ahead of the meeting that it was about “very high level and sensitive information" and "is part of Russia and its government's support for Mr. Trump."

Sen. Dianne Feinstein Dianne Emiel FeinsteinMcConnell says Trump nominee to replace Ginsburg will get Senate vote Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Intensifying natural disasters do little to move needle on climate efforts MORE (D-Calif.), the top Democrat on the Judiciary Committee, told reporters earlier this week that she wanted Trump Jr. to publicly testify before the committee.

"This is aired on front page newspapers. It should be aired front-page [in the] United States Senate. The committee of jurisdiction is clearly the Judiciary Committee," she told reporters. “It’s not an Intelligence matter.”

She added to CNN on Thursday that she wanted Trump Jr. to testify as soon as next week.

The Senate Judiciary Committee can subpoena Trump Jr. if he refuses to testify voluntarily. Under committee rules, they can issue a subpoena either when Feinstein and Grassley get an agreement or by a vote of the full committee.

Members of the Senate and House intelligence committees have also said they want to meet with Trump Jr., though neither have publicly invited him.

Grassley and Feinstein have also warned that they are willing to subpoena Paul Manafort to testify before their committee. Manafort, who was Trump's campaign chairman at the time, and Trump's son-in-law Jared Kushner also attended the 2016 meeting.