In a news conference with the president of Romania, Trump said he didn't ask Comey to "pledge allegiance" to him when they met at the White House.
The president did not make specific reference to Comey, who says Trump tried to get him to pledge loyalty and drop an investigation into potential collusion with Russian Federation by his campaign aides.
President Donald Trump says congressional Democrats are "obstructionists" who are stalling his agenda.
In his testimony to the Senate Intelligence Committee, Comey said he believes Trump fired him over the Russian Federation probe, and he accused the White House of lying about the details of the dismissal.
Trump's address to 1,500 conservative activists largely combined his standard stump speech - jobs, tax cuts, trade, immigration and withdrawing from the Paris climate accord - with a pledge that he would "battle for every American of faith who has lost their rights and lost their freedom".
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The leaders said they would not carry out the ritual that is normally performed for every Muslim, regardless of their actions. The report said Italy had put him on a watch list and flagged his presence to Moroccan and British authorities.
"You didn't let me down and I will never, ever let you down, you know that", Trump said to applause.
The issue has been in the spotlight since Mr Comey testified before a Senate committee earlier this week and urged Mr Trump to release any tapes he had of the several conversations he and the President had before he was sacked last month. During his Congressional briefing organised by the powerful Senate Select Committee on Intelligence on Thursday, Comey confessed that he leaked the information about his interaction with the U.S. president.
Trump also said he'd be "100%" willing to testify to his statement under oath. Yet it is differences of opinion among Republicans, who control both houses of Congress, that are standing in the way of what Trump wants to do on health care and other issues. He also has directed the IRS to ease up on using a rarely enforced rule barring partisan political activity by churches and tax-exempt organizations. "Yesterday showed no collusion, no obstruction", Trump said. Senate Republicans are working on their version of the bill, but are divided about the approach. "They will lie, they will obstruct, they will spread their hatred and their prejudice, but we will not back down from doing what is right".
"You know that the truth will prevail that God's glorious wisdom will shine through and that the good and decent people of this country will get the change that they voted for and that they so richly deserve", Trump said.
He urged the audience to help send more Republicans to Congress in next year's midterm elections, noting the GOP has just a two-vote edge in the Senate and a slim advantage in the House. The President touted action on abortion policy, his move to allow preachers to talk politics from the pulpit and getting Neil Gorsuch named to the Supreme Court.
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