Sen. Lisa Murkowski Lisa Ann MurkowskiSenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies McConnell says Trump nominee to replace Ginsburg will get Senate vote MORE (R-Alaska) said Saturday that she wants to hear from House impeachment managers and attorneys for President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE before deciding whether the Senate impeachment trial needs additional witnesses and documents.

The moderate senator told reporters that she came to this conclusion because she'd like to "really hear the case" before making a "determination as to, what more do we need," The Associated Press reported.

"I don’t know what more we need until I’ve been given the base case," Murkowski said, adding that she expected Senate Majority Leader (R-Ky.) to table any attempt from Democrats to add certain witnesses to an organizing resolution.

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She indicated that she'd support tabling the Democrats' request, saying that she's "worked hard" to make sure the process allows for "determination" on whether additional witnesses or documents are necessary for the trial.

“But I want to have that at a point where I know whether or not I’m going to need it," she said, according to the AP. "[My responsibility is] not to focus on the politics of where we are but a recognition that we are in the midst of an infrequent and in many ways extraordinary process that the Constitution allows for, and I’m going to take my constitutional obligations very, very seriously.”

The House voted to impeach Trump of abuse of power and obstruction of Congress in December, making him just the third president in U.S. history to face Senate removal.

Democrats in the House and Senate have repeatedly pushed McConnell to ensure that additional witnesses can testify in the impeachment trial, which follows a House inquiry focused on allegations of Trump's dealings with Ukraine.

McConnell has been against the idea, but some Republicans have expresses an openness to hearing additional witnesses at the trial.

GOP Sen. Susan Collins Susan Margaret CollinsSenate Republicans face tough decision on replacing Ginsburg Democratic senator calls for eliminating filibuster, expanding Supreme Court if GOP fills vacancy What Senate Republicans have said about election-year Supreme Court vacancies MORE (R-Maine) said Friday that she'd "likely vote" in favor of new evidence and witnesses, but that she first wanted to hear both sides present their case.