Rep. Peter King, shown here, right, on March 9, 2016,...

Rep. Peter King, shown here, right, on March 9, 2016, said he will not endorse a candidate in the Republican presidential primary. Credit: AP / Pablo Martinez Monsivais

First, Jeb Bush quit. Then, on Tuesday, Marco Rubio bowed out.After first backing Bush and then endorsing Rubio for the Republican presidential nomination, Rep. Peter King (R-Seaford) now finds himself without a candidate in the primaries.

King said for now he does not plan to endorse any of the three remaining candidates: New York businessman Donald Trump, Sen. Ted Cruz (R-Tex.) or Gov. John Kasich (R-Ohio).

King initially gave Trump the benefit of the doubt. But King said he rejected Trump after he blamed former President George W. Bush for the Sept. 11, 2001 attacks and accused Bush of lying to win support for the invasion of Iraq in 2003.

King has a long-standing dislike of Cruz -- King has criticized Cruz for the past few years for his libertarian-like foreign policy and his willingness to cause political damage to Republicans by urging the conservative House GOP bloc to shut down the government in 2013.

And King initially dismissed Kasich as having no real chance of winning the nomination.

“Of the three remaining candidates, I would be closest to John Kasich,” said King, who recalled he had worked with Kasich when they were in the U.S. House together.

But King acknowledged that Trump very well could win the nomination.

Rep. Peter King (R-Seaford) at an event in Washington, D.C.,...

Rep. Peter King (R-Seaford) at an event in Washington, D.C., Tuesday, March 10, 2015. King said, for now, he does not plan to endorse any of the three remaining GOP candidates: New York businessman Donald Trump, Sen. Ted Cruz (R-Tex.) or Gov. John Kasich (R-Ohio). Credit: AP / Pablo Martinez Monsivais

“He’s definitely the front-runner. He’s clearly the favorite,” King said.

How would Trump fare as the GOP nominee against Democrat Hillary Clinton?

“Honestly, I don’t know. I could see Donald Trump winning the general election by 10 points or losing it by 20,” King said, noting how unpredictable this year’s presidential race has been.

“I will support the Republican nominee,” King said. The question is, he said, how enthusiastically.