Clapper added that there is "no telling" what Trump exposed to Putin during their closed-door meeting on Monday in Helsinki, and that "makes me very nervous".
Huntsman attended a larger meeting of the US and Russian delegations but has not spoken publicly about his role or what was talked about.
However, Mr Putin said "powerful" U.S. forces were trying to sabotage what the summit had achieved.
"I just felt at this point in time that what we had assessed and reassessed and reassessed, and carefully gone over, still stands", Coats said. He has made contradictory statements over whether he believes Russian Federation interfered in the 2016 US election.
"They are feeding millions of their people stories", he said.
Trump's comments in support of arch-rival Russian Federation were condemned by both Democrats and Republicans. "So, certainly, as the leader of a country, you would have to hold him responsible, yes".
Critics have accused him of siding with Russian Federation over his own country by failing to criticise Moscow for what USA intelligence agencies previous year described as Moscow's interference in the 2016 election in an attempt to sow discord, aid Trump's candidacy and disparage Trump's Democratic opponent Hillary Clinton.
First Deputy Chairwoman of the Verkhovna Rada of Ukraine, MP Iryna Gerashchenko has said Ukrainian diplomats and lawyers must use Russian President Vladimir Putin's statement on a Russian-organized "referendum" in Ukraine's Crimea as confession while preparing lawsuits in worldwide courts.
More news: Here's when and where thunderstorms are forecast in MA on Tuesday"I have been trying my best to give the president the benefit of the doubt", Clapper, now a CNN national security analyst, told "New Day" co-host Alisyn Camerota about Trump and Russian Federation.
"I was just doing my job", Coats told an audience at the Aspen Security Forum in Aspen, Colorado, defending a public rebuke he'd issued on Monday after Trump claimed Russian Federation hadn't targeted the U.S.
Of greatest interest to Western observers will likely be videos showing Mr Putin's nuclear-powered cruise missile - now being called Burevestnik, which has meanings ranging from "storm-bringer" and "thunderbird" to "petrel" - and the Avangard ground-launched hypersonic missile.
On Thursday, Trump offered fresh remarks, claiming to CNBC he has been "far tougher on Russian Federation than any president in many, many years" and warning that he would be Putin's "worst enemy" if their diplomatic engagement does not work out.
Trump has come under widespread domestic criticism about the meeting.
While he praised Trump's mediation efforts in North Korea, Putin slammed his decision to pull out of the global accord curbing Iran's nuclear activities. Some lawmakers were also upset by Mr Trump when he declined to offer any particular criticism for the state of US-Russia relations, saying instead "I think we've all been foolish".
Russian Federation has not yet spoken about any second meeting with the American president.
Roland Murof, a spokesman for the Estonian military, said the instances of Russian planes intruding North Atlantic Treaty Organisation airspace "go up when something political is going on".
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