Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellOcasio-Cortez to voters: Tell McConnell 'he is playing with fire' with Ginsburg's seat McConnell locks down key GOP votes in Supreme Court fight Video shows NYC subway station renamed after Ruth Bader Ginsburg MORE (R-Ky.) met with Sen. Lisa Murkowski Lisa Ann MurkowskiMcConnell locks down key GOP votes in Supreme Court fight Most Americans think winner of election should pick next Supreme Court justice: poll Murkowski: Supreme Court nominee should not be taken up before election MORE (R-Alaska) on Wednesday as he tries to lock down the votes to block new witnesses in President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE's impeachment trial.

Murkowski largely declined to discuss her current thinking on calling witnesses but confirmed to reporters that she had met with the GOP leader.

“I am not going to be discussing the witness situation right now,” she said.

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She added that she was focused on the upcoming two-day question-and-answer period and had been in talks with GOP leadership staff about how to get her questions answered.

“I’ve got some more questions that I want to get into the mix,” she said. “I’ve been talking to the folks in the cloakroom to see what the universe is, and how we can supplement that.”

Murkowski told reporters that she has 14 questions, including on issues like subpoenas and documents.

“They’re all over the board,” she said.

Democrats want to subpoena four witnesses and compel the administration to hand over Ukraine-related documents. They would need four Republicans to vote to allow witnesses and four votes for every subsequent vote on calling specific individuals or documents.

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The McConnell-Murkowski meeting comes as the GOP leader is working to lock down 51 votes by Friday against calling witnesses.

The Senate GOP conference met on Tuesday afternoon to discuss the looming fight over impeachment witnesses.

Former national security adviser John Bolton John BoltonDiplomacy with China is good for America The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep DOJ launches probe into Bolton book for possible classified information disclosures MORE’s claim in his forthcoming memoir, reported by The New York Times, that Trump told him in August that he wanted to continue to suspend security assistance to Ukraine until the country announced investigations into former Vice President Joe Biden Joe BidenBiden leads Trump by 36 points nationally among Latinos: poll GOP set to release controversial Biden report Can Donald Trump maintain new momentum until this November? MORE and his son Hunter Biden has put new pressure on Republicans to call Bolton.

With several Republican senators, including Murkowski, publicly undecided on calling witnesses, McConnell does not yet have a lock on 51 votes.

But members of leadership expressed confidence after the meeting that they would be able to block witnesses.