The GOP chairmen of the Senate committees that would be involved in an impeachment trial are seeking records and interviews related to allegations that a Democratic National Committee consultant solicited derogatory information about the Trump campaign from Ukrainian embassy officials ahead of the 2016 presidential election.

In a news release Friday, Senate Homeland Security and Governmental Affairs Chairman Ron Johnson, R-Wis., Senate Judiciary Committee Chairman Chuck Grassley, R-Iowa, and Senate Finance Committee Chairman Chuck Grassley, R-Iowa, said they are looking to obtain records and transcribed staff interviews with two individuals reportedly involved in an effort by Ukrainian embassy officials to “undermine” the Trump campaign in the 2016 election.

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“To believe that the mainstream media will investigate all things Russia or Ukraine is to hope against hope,” Graham said in a statement Friday. “The hacking of the Democratic National Committee’s emails was done by the Russians and no one else. Whether there’s a connection between Democratic operatives and Ukrainian officials during the 2016 election has yet to be determined.”

He added: “It will only be found by looking. We intend to look.”

The requests from Grassley, Graham and Johnson come as House Democrats are entering what may be the final phase of their impeachment inquiry ahead of introducing articles of impeachment for a vote. Should the House approve impeachment articles and trigger a trial in the Senate, Republicans plan to turn the tables on Democrats, by looking more closely at issues that House Democrats glossed over during their hearings.

Friday’s requests are a continuation of an inquiry that Grassley launched in 2017 when he was chairman of the Judiciary Committee. Grassley, at the time, was questioning the actions of then-DNC consultant Alexandra Chalupa, which he said seemed to show that she was “simultaneously working on behalf of a foreign government, Ukraine, and on behalf of the DNC and Clinton campaign, in an effort to influence not only the U.S. voting population but U.S. government officials.”

Chalupa has denied the accusations: “For the record: I have never worked for a foreign government. I have never been to Ukraine. I was not an opposition researcher. In 2008, I knew Manafort worked for Putin’s interests in Ukraine. I reported my concerns about him to the NSC in 2014 & sounded the alarm bells in 2016,” Chalupa tweeted last month.

In addition to the interview and records requests, Johnson, Grassley and Graham are requesting “staff-led transcribed interviews” with Chalupa, and Andrii Telizhenko, a political officer within the Ukrainian embassy at the time. Telizhenko reportedly was ordered to assist in an off-the-books investigation into ties between the Trump campaign and Russia, which included then-Trump campaign advisor Paul Manafort’s prior business dealings in the region.

Senate Minority Leader Chuck Schumer, D-N.Y., on Friday blasted the latest GOP efforts, saying it "undermines our democracy."

“Putin and his intelligence services disinformation campaign team in Moscow couldn't have cooked up a more useful tool for spreading conjured and baseless conspiracy theories than the one Chairmen Graham, Grassley and Johnson announced today," Schumer said in a statement.

Last month, Johnson and Grassley also requested information from the National Archives and Records Administration regarding meetings that took place in 2016 involving Obama administration officials, Ukrainian government representatives, and Democratic National Committee officials. They also requested Justice Department records related to the FBI’s interactions with Chalupa.

The Republicans emphasized Friday that their interest in Ukraine does not mean they deny Russia's meddling in 2016.

“The senators’ inquiries are unrelated to an uncorroborated theory that Ukraine was also behind the hack of the DNC servers,” the statement from the senators said. “U.S. intelligence officials and Special Counsel Robert Mueller’s investigation found that Russia was responsible for the DNC hack.”

The three senators have also recently requested information related to potential conflicts of interest and political influence by Ukraine, including the natural gas firm Burisma Holdings, which employed former Vice President Joe Biden’s son, Hunter Biden, on the board. At the time, the elder Biden was running U.S.-Ukraine relations and policy for the Obama administration.

And Graham, last month, alone, wrote a letter to Secretary of State Mike Pompeo requesting the release of any documents related to contacts between Biden and former Ukrainian President Petro Poroshenko, and to a meeting between son Hunter Biden’s business partner and former Secretary of State John Kerry.

This pertains to questions surrounding the elder Biden’s role in pressing for the ouster of a Ukrainian prosecutor who had been investigating the founder of Burisma. Biden denies any wrongdoing, but Republicans have pressed for details throughout the impeachment process, in a bid to show that even though President Trump’s pressure campaign on Kiev triggered the impeachment inquiry, his concern was legitimate.

At the center of the impeachment inquiry, which began in September, is Trump’s July 25 phone call with Kiev. That call prompted the whistleblower complaint to the intelligence community inspector general, and in turn, the impeachment inquiry in the House. Trump challenged the accuracy of the complaint, though the transcript released by the White House did support the core allegations that he pressed for politically related investigations.

The president’s request came after millions in U.S. military aid to Ukraine had been frozen, which Democrats and witnesses have claimed shows a "quid pro quo" arrangement. Trump denies any wrongdoing.

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Meanwhile, Trump challenged House Democrats this week to impeach him "fast" so that he can have a "fair trial" in the Senate. He also threatened to seek testimony from the Bidens, House Intelligence Committee Chairman Adam Schiff, and House Speaker Nancy Pelosi.

Pelosi, D-Calif., then dramatically called for the House to proceed with drafting articles of impeachment.

"The facts are uncontested. The president abused his power," Pelosi said.

But despite his threats, the president does not, alone, have the power to call witnesses to testify in those proceedings. In the Senate trial, three separate parties have input to how it will play out: Senate Republicans, Senate Democrats and the White House.

A senior Senate Republican aide told Fox News last month that once they receive articles of impeachment, they will begin working on two resolutions — one that governs the timeline of the trial, and the other that sets up witnesses for closed-door depositions, as well as which witnesses will be required to testify on the stand.

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The aide suggested that Republican senators – like Graham, Johnson, and Grassley – could be attempting to help “shape” the witness list and the trial in their recent attempts to obtain documents and information from the administration and companies related to Hunter Biden.