The Wisconsin Republican told NBC's "Meet the Press" that "the last thing I would do is tell anybody to do something that's contrary to their conscience. Of course I wouldn't do that."
Ryan, who has given a tepid endorsement to Trump, said he understands he is in a "very strange situation" to be supporting the party's presumptive nominee while not urging his fellow lawmakers to follow suit. But he said Trump is "a very unique nominee."
As speaker of the House, Ryan said he feels a responsibility not to lead "some chasm in the middle of our party" that would hurt GOP chances to win the White House. His reluctance to embrace the party's nominee wholeheartedly is remarkable for a Republican who was the GOP's vice presidential candidate in 2012.
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He told reporters at a news conference yesterday that he will continue to speak out in defense of conservative principles, despite a warning from Trump that Republican congressional leaders should "be quiet."
He and other congressional leaders "represent a separate but equal branch of government," Ryan said as he vowed to "robustly defend the separation of powers."
Ryan's comments came as Rep. Fred Upton, R-Mich., a 30-year House veteran and committee chairman, said he will not endorse Trump for president. Maryland's Republican Gov. Larry Hogan also said he will not vote for the billionaire presidential candidate. And Ohio Gov. John Kasich, a former GOP candidate for president, said he's still not ready to endorse Trump.
"I don't have a plan to do that," he said yesterday, calling differences among party leaders "just the way things work.