Several members of President Donald Trump's own party blasted him over his summit and joint news conference with Russian President Vladimir Putin.

In a lengthy and fiery statement, Senator John McCain of Arizona called the Finland summit a "tragic mistake" and "one of the most disgraceful performances by an American president in recent memory."

"The damage inflicted by President Trump’s naiveté, egotism, false equivalence, and sympathy for autocrats is difficult to calculate. He and Putin seemed to be speaking from the same script as the president made a conscious choice to defend a tyrant against the fair questions of a free press," McCain said.

"No prior president has ever abased himself more abjectly before a tyrant," he continued.

Tennessee Senator Bob Corker said Trump effectively gave Putin "a public approval by the greatest nation on Earth."

"I would guess [Putin] is having caviar right now," he said.

McCain's fellow Arizona Sen. Jeff Flake also ripped Trump, saying he thought he would never "see the day" when an American president would blame America in part for "Russian aggression."

Trump's Director of National Intelligence Daniel Coats said he gives the president the best information on issues such as foreign interference and meddling.

Coats, a former Indiana senator, said his team has "been clear in our assessments of Russian meddling" after Trump said he takes Putin at his "strong" words denying attempts to interfere in the 2016 election.

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Maine Sen. Susan Collins, a key vote in the forthcoming confirmation hearing for Supreme Court nominee Judge Brett Kavanaugh, said she "strongly disagreed" with Trump's statements about Russian interference.

California Rep. Ed Royce, the chairman of the House Foreign Affairs Committee, said there is "no way" that Trump should be comparing the actions of U.S. intelligence agencies to that of Putin's Kremlin.

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