TRENTON -- Lt. Gov. Kim Guadagno is breaking with Gov. Chris Christie and says she will not vote for Republican presidential nominee Donald Trump, and hasn't decided if she'll vote for a third party candidate or forgo casting a vote for president and only vote in the down-ballot races.

So, too, is the only declared 2017 GOP governor candidate, state Assemblyman Jack Ciattarelli (R-Somerset), who says he likely won't vote for president in November, and is calling on Trump to voluntarily step aside.

For years, Guadagno has been a Christie loyalist, never publicly taking a position that differed from that of her boss and deflecting most of political questions to the governor to whom she owes her job.

That changed on Saturday, when Guadagno answered a question on Twitter from an editor at the south Jersey publications The Daily Journal and Courier-Post about her reaction to an explosive video of Donald Trump's boasting of a cavalier attitude about sexual assault.

No apology can excuse away Mr. Trump's reprehensible comments degrading women. We're raising my 3 boys to be better than that. — Kim Guadagno (@KimGuadagnoNJ) October 8, 2016

NJ Advance Media contacted Guadagno on Sunday morning to ask her about her comment, and whether she would be voting for Trump.

Her response: "I can't support Hillary Clinton, and I won't vote for Donald Trump."

For most of the summer and all of this fall, Christie had argued to Republicans on the fence about Trump that they are confronted with a 'binary choice.'

"Every Republican who is not working for Trump is working for Clinton," Christie said in July. "It's chicken or fish, man. It's one or the other."

On Sunday, Guadagno, who is mulling a run for governor herself, said she wasn't sure if she would vote for the Libertarian candidate, former New Mexico Gov. Gary Johnson, or not vote at all.

"Haven't decided," said Guadagno.

Asked why she wasn't voting for Trump, the lieutenant governor responded that her "statement speaks for itself."

Ciattarelli (R-Somerset), who declared his own 2017 candidacy for governor last week, said that up until the release of the video showing Trump seemingly bragging about sexually assaulting women with impunity, he had been willing to pull the lever for him in November.

"Up until yesterday's revelations I was willing to give Trump consideration, because his candidacy would mean an end to gridlock," Ciattarelli said in an interview with NJ Advance Media on Sunday afternoon, calling Trump's remarks "offensive and indefensible."

"If I am leaning any way, it's the Reagan way, which was, in 1976, he didn't vote for either candidate," Ciattarelli said. "Because, what does it matter if Hillary Clinton wins New Jersey? The presidency isn't awarded based on the popular vote. That's where I'm headed."

He added that Trump "should give very serious consideration to voluntarily stepping down and giving Mike Pence or Paul Ryan the chance to win this election."

On Saturday, former Gov. Christie Todd Whitman emailed NJ Advance Media to clarify that she would not vote for Trump either, but would back Clinton, although with the caveat that she was not leaving abandoning the GOP.

"Those of us Republicans who have made clear we cannot vote for Trump are not leaving the party, we are remaining true to the principles that have guided the party for more than 150 years," Whitman wrote.

Claude Brodesser-Akner may be reached at cbrodesser@njadvancemedia.com. Follow him on Twitter @ClaudeBrodesser. Find NJ.com Politics on Facebook.