"There is simply no other way to explain why he would side with this Kremlin former KGB officer rather than his own intelligence agencies", he said.
A meeting of USA and Russian presidents Donald Trump and Vladimir Putin took place in the Finnish capital Helsinki on July 16.
"I certainly think he's acting like someone who is compromised", Schiff said on ABC News' "This Week."
Mr Trump accused the news media of trying to provoke a confrontation with Moscow that could lead to war, although concerns about the meeting have been raised by a broad cross-section of Republicans and Democrats.
Rice alleged that Trump has taken decisions that have served Russian interests as opposed to U.S. interests. But Trump cast doubt once again in a Sunday tweet, diminishing at least the significance, if not the existence, of the interference and the USA investigation into Russia's actions.
"It's only productive if we understand who he is and what he wants", said Rubio.
National Intelligence Director Dan Coats spoke at a security forum in Aspen on Thursday, July 19, 2018.
Donald Trump hits back at Iran with explosive threat
His speech "only underscores the counterproductive nature of this administration's Iran strategy and parallels efforts by the G. North's Foreign Ministry accused the United States of making "gangster-like" demands for its unilateral disarmament.
Mr. Trump said following the summit that he had meant to say "wouldn't" instead of "would" during a press conference with Putin in which he cast doubt on the intelligence community's assessment of Russian interference.
After Mr Trump and Putin hailed their summit a success the US President has extended an invitation for the Russian leader to a second meeting.
Trump initially appeared receptive to Putin's offer, calling it an "incredible offer" at last Monday's press conference.
"Hopefully something like that never happens again, but I think it's important though to focus on the policy, which ultimately is what matters", Rubio said. That's why such a large segment of President's Trump's remarks during the question and answer period in Helsinki focused not on Russia's meddling, but on the questions of whether his campaign colluded with Russian Federation or whether Russia's meddling affected the outcome of the election.
However, nearly as many - 35 percent - say Trump handled Putin "about right", while another 15 percent say he did not go far enough to support Putin.
Schiff's comments as controversy continues to swirl over Trump's unwilling to denounce Russian election meddling to Putin's face, something that Trump threw flames on Sunday night when he sent out a tweet declaring Russia's meddling "a hoax." . "OK, that's going to be special".
The most surreal aspect of the latest lurches of this unparalleled presidency is the intensifying public debate over the once implausible idea that the President of the United States is compromised by a hostile foreign power.
Graham continued: "What I do expect is for the administration and the president, eventually, to tell us were any agreements reached". This much is true: Donald Trump has made it plain often enough that he wishes to improve relations with Russian Federation and to disregard all of the many points of contention between the two countries, not limited to Russia's role in his being elected president.
But, Barletta's campaign said, "our adversarial relationship should not derail efforts to find common ground through diplomacy on important issues like stabilizing Syria and denuclearization - just like our stalwart alliances with European nations should not handcuff United States policy from requesting trade fairness and full North Atlantic Treaty Organisation payments".