Sen. Susan Collins Susan Margaret CollinsMcConnell 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-Maine), who announced last week that she won't back Republican presidential nominee Donald 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 for president, said on Sunday that she will take a look at supporting the Libertarian ticket instead.

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"I unfortunately cannot support either major-party candidate, and I'm taking a look at the Libertarian ticket because it's headed by two former Republican governors," Collins said on CBS's "Face the Nation."

"I may end up writing in the name of the person I think is best qualified to be our next president," she said.

Last week, Collins said she would consider the Libertarian Party, but only if it were flipped with vice presidential nominee and former Massachusetts Gov. Bill Weld leading the ticket. New Mexico Gov. Gary Johnson Gary Earl JohnsonWhat the numbers say about Trump's chances at reelection Presidential race tightens in Minnesota as Trump plows resources into state The Hill's Campaign Report: Biden condemns violence, blames Trump for fomenting it l Bitter Mass. primaries reach the end l Super PAC spending set to explode MORE is the party's current nominee.

"I know Bill Weld well, and I respect him a great deal," Collins said last Tuesday on CNN.

Collins last Monday penned a Washington Post op-ed explaining why she wouldn't back her party's nominee for president, saying it wasn't a decision she made lightly.

She wrote that Trump hasn't changed or evolved as a candidate and continues to dismay her with his "constant stream of cruel comments and his inability to admit error or apologize."

"My conclusion about Mr. Trump’s unsuitability for office is based on his disregard for the precept of treating others with respect, an idea that should transcend politics," Collins wrote.