Sara Gideon, speaker of the Maine House of Representatives, has a 1-point lead over the senator.
Maine Senator Susan Collins told CBS News Tuesday she believes President Donald Trump has "learned a big lesson" from his impeachment while Collins' opponent in Maine's upcoming senate race, Sara Gideon, said she would have voted to remove the president from office.
A moderate member of her party who faces a tough reelection and who was previously undecided on impeachment, Collins was one of just two GOP senators who sided with Democrats last week in a failed effort to subpoena documents and witnesses.
"I think Susan Collins probably got in more of a jam than anybody else," conservative radio host Howie Carr told 'Fox & Friends.'
"Hey hey, ho ho, Susan Collins has to go," the best-selling author tweeted.
Fox News analyst Ed Rollins described Maine Senator Susan Collins as a "dead woman walking" after she voted to hear from witnesses in President Donald Trump's impeachment trial Friday. Collins "probably signed her death warrant today," Rollins said.
The revelation brings President Trump one step closer to becoming the third president in U.S. history to be acquitted of articles of impeachment. But that vote may not come until next week.
"This is the end game," author Grant Stern wrote on Twitter.
'Fox & Friends' co-host Brian Kilmeade said no witnesses would have been called and the process would have promptly moved past that without this development.
"It's pretty fair to say that John Bolton has a relevant testimony to provide," the Republican senator told reporters.
Senate Republicans expressed dismay after the House Intelligence Committee Chairman repeated an anonymously-sourced quote which said Donald Trump will put senators' "head on a pike" if they vote against the president.
"I think we ought to go through the right process," the lawmaker from Florida said.
The move to modify a resolution to outline the rules for President Trump's Senate impeachment trial underscored the power that a small group of Republican lawmakers wield over leadership.
Sen. Susan Collins (R-Maine) has overtaken Senate Majority Leader Mitch McConnell (R-Ky.) as the country's least popular senator, according to the results of a new tracking poll.
Maine Republican Senator Susan Collins wondered why new evidence in the impeachment trial against President Donald Trump from Rudy Giuliani's associate Lev Parnas had not been entered into the record earlier, although it was only released Tuesday.
After praising the "unvarnished, direct democracy" that a town hall provides, Collins has not attended a single town hall in 2019.
Andrew Napolitano cited "new emails of people getting instructions directly from the president to hold up on the sending of the [military] funds [to Ukraine]."
"Staying silent will only lead observers to infer that you care more about book royalties than, you know, who should be the president of the United States," Daniel W. Drezner wrote.
Maine Senator Susan Collins is the second Republican to criticize Majority Leader Mitch McConnell for his pre-impeachment trial comments about being in "total coordination" with President Donald Trump.
"But I think anyone voting on the facts, anyone voting on the law, this is a very easy vote," the senator from Texas argued.
The Senate majority leader can afford to have only two of his members side with the Democrats if the minority leader forces a chamber vote on whether to allow witnesses during the trial.
"It would be counterproductive," Republican Senator John Cornyn said.
"The party was shaken by that," Scott Reed said. "We're all worried," he added.
"You'll have a very Democratic Senate next year," former Massachusetts Governor Bill Weld said.
"But I wouldn't be surprised if it's even more than that," Representative Brendan Boyle said.
"I do not regret my vote in the least," Maine GOP Senator Susan Collins said of her "yes" vote to confirm Supreme Court Justice Brett Kavanaugh last year.
Maine Senator Susan Collins told PBS "NewsHour" host Judy Woodruff she was going to wait "to see what happens" before endorsing a presidential candidate.
GOP Senator Susan Collins told CNN that Thursday's vote on two bills to reopen the government made her see "signs of progress for the first time since the shutdown began."