Sen. Lisa Murkowski Lisa Ann MurkowskiMomentum growing among Republicans for Supreme Court vote before Election Day Collins: President elected Nov. 3 should fill Supreme Court vacancy Barrett seen as a front-runner for Trump Supreme Court pick MORE (R-Alaska) says she is "curious" to know what 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 might have to say about 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 relations with Ukraine but stopped short of saying if she would support calling him to testify in the impeachment trial.

"Well I read it. I've said before I was curious what Ambassador Bolton might have to say and I'm still curious," Murkowski said Monday when asked by The Hill about her reaction to a New York Times story about Bolton's forthcoming memoir.

The Times reported on Sunday night that Bolton claims in the book that Trump tied Ukraine aid to its help with investigations into Democrats including former Vice President Joe Biden Joe BidenMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE and his son Hunter Biden.

ADVERTISEMENT

“I stated before that I was curious as to what John Bolton might have to say. From the outset, I’ve worked to ensure this trial would be fair and that members would have the opportunity to weigh in after its initial phase to determine if we need more information,” Murkowski said in a tweet Monday shortly after noon, adding that she would make her decision soon.

(2/2) I’ve also said there is an appropriate time for us to evaluate whether we need additional information —that time is almost here. I look forward to the White House wrapping up presentation of its case. — Sen. Lisa Murkowski (@lisamurkowski) January 27, 2020

Two other moderate Republicans — Sens. Mitt Romney Willard (Mitt) Mitt RomneyMomentum growing among Republicans for Supreme Court vote before Election Day Toobin: McConnell engaging in 'greatest act of hypocrisy in American political history' with Ginsburg replacement vote The Memo: Court battle explodes across tense election landscape MORE (Utah) and Susan Collins Susan Margaret CollinsJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally Momentum growing among Republicans for Supreme Court vote before Election Day MORE (Maine) — indicated Monday that the Bolton news increases the chances they will support calling witnesses before the chamber, a key point of contention as Trump’s trial enters its second week.

ADVERTISEMENT

Every Republican voted against subpoenaing Bolton as part of a rules resolution that passed the chamber last week, delaying the decision until mid-trial.

GOP senators indicated that they expect the witness vote will happen on Friday.

Democrats will need four Republicans to vote with them in order to pave the way for witnesses. After that, both sides could make motions for specific individuals, and the Senate would vote on those requests.

Romney told reporters that he thought it was "increasingly likely" that additional GOP senators will support calling Bolton, while Collins said in a statement that "the reports about John Bolton's book strengthen the case for witnesses and have prompted a number of conversations among my colleagues."

Sen. Lamar Alexander Andrew (Lamar) Lamar AlexanderToobin: McConnell engaging in 'greatest act of hypocrisy in American political history' with Ginsburg replacement vote Chamber of Commerce endorses McSally for reelection Trump health officials grilled over reports of politics in COVID-19 response MORE (R-Tenn.), another potential swing vote, on Monday said he is also sticking to his plan of waiting until after both sides have had a chance to present opening arguments and senators have asked questions before deciding on witnesses.

"I worked with my colleagues to make sure we have a chance after we've heard the arguments, after we've asked our questions to decide if we need additional evidence and I'll decide that at that time," he said.