Donald Trump Jr. To Testify Publicly In Russia Probe 'This Fall,' Top Democrat Says

WASHINGTON ― One of the congressional committees probing whether President Donald Trump’s campaign colluded with Russia in last year’s election expects public testimony from Trump’s eldest son and may subpoena the president’s former campaign chairman, two key figures in the ongoing investigations, according to the top Democrat on the committee, Sen. Dianne Feinstein (D-Calif.). 

Donald Trump Jr. is expected to testify some time “this fall,” Feinstein said Sunday on CNN’s “State of the Union.” “I know that for sure.”

Feinstein is the ranking member of the Senate Judiciary Committee, one of several congressional committees investigating ties between Trump’s team and Russia last year, in addition to an independent investigation led by special counsel Robert Mueller.

Staffers on the committee, chaired by Sen. Chuck Grassley (R-Iowa), conducted a private interview with Trump Jr. earlier this month about his June 2016 meeting with a Russian lawyer.

Trump Jr. arranged the meeting, which was also attended by then-campaign chairman Paul Manafort and Trump’s son-in-law and senior adviser Jared Kushner, after being promised dirt on his father’s opponent, Hillary Clinton. According to emails released by Trump Jr., he was told that the information was connected to a Russian government effort to help his father.

“I think it’s Sen. Grassley’s intent, and certainly my intent, to have him before the committee in the open, and be able to ask some questions under oath,” Feinstein said Sunday.

She also affirmed that the committee is “likely” to subpoena Manafort “if he refuses to come before the committee.”

Manafort has shown a reluctance to cooperate with the committee, which previously issued a subpoena in July but dropped it after Manafort agreed to hand over documents related to the investigation, while continuing to work out an agreement to have him testify at a later date.

His foreign business dealings, as well as lobbying work for pro-Russia groups, have made him a prominent figure in the multiple investigations.

Last month, Mueller’s probe reportedly issued subpoenas for two of Manafort’s former aides.

Mueller’s team is also looking into Trump Jr.’s meeting and the extent of the president’s knowledge of and involvement in it.

Feinstein stressed on Sunday that while the investigations are moving forward, they could take “a long time” to complete.

“This could take a year, a year and a half, if not more, so I think people have to be patient,” she said.

Also on HuffPost

Donald Trump Jr., President Donald Trump's eldest son

Donald Trump Jr. arrives at Trump Tower in New York City, U.S. January 18, 2017. REUTERS/Stephanie Keith

Jared Kushner, Trump's son-in-law and adviser

WASHINGTON, DC - JUNE 06: (AFP OUT) White House senior adviser Jared Kushner smiles during a meeting with House and Senate leadership in the Roosevelt Room of the White House on June 6, 2017 in Washington, DC. (Photo by Olivier Douliery - Pool/Getty Images)

Paul Manafort, Trump's then-campaign chairman

UNITED STATES - JULY 19: Paul Manafort, advisor to Donald Trump, is seen on the floor of the Quicken Loans Arena at the Republican National Convention in Cleveland, Ohio, July 19, 2016. (Photo By Tom Williams/CQ Roll Call)

Natalia Veselnitskaya, Russian lawyer

A picture taken on November 8, 2016 shows Russian lawyer Natalia Veselnitskaya posing during an interview in Moscow. The bombshell revelation that President Donald Trump's oldest son Don Jr. met with a Kremlin-tied Russian lawyer hawking damaging material on Hillary Clinton has taken suspicions of election collusion with Moscow to a new level. / AFP PHOTO / Kommersant Photo / Yury MARTYANOV / Russia OUT (Photo credit should read YURY MARTYANOV/AFP/Getty Images)

Rob Goldstone, music publicist

MIAMI BEACH, FL - DECEMBER 31: Rob Goldstone (center), with his client, Russian singer Emin Agalarov (left), and Sheila Agalarova (right), attends New Years Eve And Birthday Party For Irina Agalarova at Barton G on December 31, 2014 in Miami Beach, Florida. (Photo by Aaron Davidson/Getty Images for Irina Agalarov)

Anatoli Samochornov, Russian-American interpreter

Anatoli Samochornov (right) interprets at a New York Public Library event with journalists Masha Gessen and Svetlana Alexievich in 2016.

Ike Kaveladze, Russian businessman

Love HuffPost? Become a founding member of HuffPost Plus today.

This article originally appeared on HuffPost.