Collins, a member of the Senate intelligence committee, which is investigating Russia's interference in the 2016 election, said Comey's motivation "may have been a good one".
Asked why he thought the president fired him, Comey said he wasn't certain but added: "Again, I take the president's words".
Iohannis also praised the U.S.
President Donald Trump sat through the first half of Jim Comey's testimony Thursday before the Senate Intelligence Committee, which was long enough for him to hear the former FBI Director he fired say the White House lied about him.
Trump agreed Wednesday not to directly engage on Comey, and by the time the ousted Federal Bureau of Investigation director took the witness stand, tweeting "was not something he was considering", one senior White House official said. Asked if he would speak to the issue under oath, Trump said: "100 percent".
Jorge Benitez, a NATO specialist at the Atlantic Council, said Trump's statement was less than a whole-hearted commitment. He painted Trump as a chief executive dismissive of the FBI's independence and made clear that he interpreted Trump's request to end an investigation into Flynn, his former national security adviser, as an order coming from the president. As for recordings of the conversations in question, the US President commented he was not providing hints about anything, but will let the world know "about it over a very short period of time".
Seven House Democrats, led by Rep. Adam Smith of California, the ranking member on the House Armed Services Committee, sent Trump a letter Friday urging him to make an explicit commitment. "I know I can count on you!"
Existing climate efforts expected to keep US goals on track
Hawaii has become the first U.S. state to formally adopt pledges in the Paris Agreement to drastically tackle climate change. Hawaii on Tuesday became the first state in the country with laws that implement portions of the Paris climate deal.
Trump lashed out at Comey, dubbing him a "leaker" for indirectly providing reporters with the contents of his memos summarizing their private conversations in the weeks before he was sacked.
"Well, I'll tell you about that maybe sometime in the very near future", he said at the media conference.
"I will say this - that because of our actions, money is starting to pour into NATO", Trump asserted Friday.
"Yesterday showed no collusion, no obstruction", Trump said in reference to the twin controversies dogging his administration - accusations his aides colluded with the Russian effort to tilt the vote, and that he sought to block the related Flynn probe.
Dave Boyer, The Washington Times: Mr. President, this morning on Twitter you were referring to the testimony of James Comey vindicating you.
Comey: "Trump administration lied about me & Federal Bureau of Investigation". It was a stunning accusation, suggesting that the former Federal Bureau of Investigation director had lied to Congress, while under oath. No, I didn't say that and I didn't say the other. We are doing really well.
"Despite so many false statements and lies, total and complete vindication", Trump wrote, suggesting that Comey had committed perjury. But, we were very, very happy, and, frankly, James Comey confirmed a lot of what I said.
Comey said he felt uncomfortable with the nature of his personal meetings with Trump, including a private dinner at the White House.