ABC News(WASHINGTON) —  Former Director of National Intelligence James Clapper told ABC News he did not see anything to suggest that Russia successfully infiltrated Donald Trump’s presidential campaign or recruited any of Trump’s advisers – at least as of Jan. 20, when the retired three-star general left office.

“There was no evidence whatsoever, at the time, of collusion between the Trump campaign and the Russians,” Clapper, a career intelligence officer, told ABC News’ Brian Ross in an interview Monday for World News Tonight.

The Clapper comments came amid a fight between the Trump administration and the FBI over the wiretapping claim the President made in a series of early morning tweets Saturday from his Palm Beach getaway, in which he accused former President Obama of wiretapping Trump Tower. The president compared it to the Watergate scandal but without backing that up with any explanation as to why he believes the eavesdropping occurred.

Clapper denied in the same interview that there were any wiretaps on Trump Tower during the 2016 campaign, saying “there was no wiretap against Trump Tower during the campaign conducted by any part of the National Intelligence Community.”

“None at all…including the FBI,” he said.

FBI Director James Comey asked the Trump Department of Justice — his supervisors — to publicly refute that claim, a senior official told ABC News. Comey felt Trump’s allegation had impugned the FBI’s reputation by suggesting agents conducted illegal or politically-motivated surveillance.

But the Justice Department has remained silent this week, leaving Comey, a Republican career law enforcement official appointed by Obama to a 10-year term, in an ethical bind. Two weeks ago, White House Chief of Staff Reince Priebus asked the FBI to do something similar, to publicly refute the months’ of stories suggesting collusion between the Kremlin’s agents and Trump campaign operatives, but Comey had refused, White House aides acknowledged.

Asked on Monday by ABC News’ George Stephanopoulos on Good Morning America whether President Trump accepted the FBI director’s reported denial of his wiretap claim, White House spokesperson Sarah Huckabee Sanders said, “you know, I don’t think he does, George.” White House aides also said Trump has not asked Comey what actually happened last year.

Clapper, the former Director of National Intelligence (DNI), wasn’t asked by the Trump White House to do what the FBI director had declined to do — throw them a political lifeline. But he disputed such claims anyway about Russia infiltrating the campaign in the Monday ABC News interview – and did so with the encouragement of the FBI’s leadership, current and former U.S. officials told ABC News.

The now-retired intelligence chief, who served presidents of both parties in uniform and as civilian DNI under Obama, wanted to set the record straight on both the wiretapping claim and on the suggestion by Trump’s critics that the Kremlin may have succeeded in recruiting someone in Trump’s camp, the officials said.

Former National Security Agency and CIA Director Michael Hayden, a Bush appointee who has criticized Trump, said in an ABC News interview on Tuesday that – based on his long associations with both Comey and Clapper – the wiretapping denials in particular should be believed.

“I’m led to conclude this really just didn’t happen,” said Hayden, author of the new book, Playing to the Edge: American Intelligence in the Age of Terror.

Asked about the White House declining to accept the wiretapping denials by both Comey (through surrogates) and by Clapper, the former DNI said on Monday that he was not surprised and he added, “Well, that’s his prerogative.”

“I think when he [Trump] says things, which he for whatever reason, believes – he is – it’s been my observation – he doesn’t back down from it,” Clapper told ABC News.

A senior intelligence official told ABC News last month that, so far, there is no hard evidence that Trump campaign aides were aware Russians they spoke to were intelligence officers — as advisers such as Paul Manafort have long insisted in various interviews. But an FBI counterintelligence probe continues into Russian government efforts to disrupt or influence the U.S. 2016 election process and nothing has been ruled out yet, sources have said.

As President, Trump and White House officials have insisted they had no known meetings or dealings with any Russian government agents, only to see former aides such as Carter Page and J.D. Gordon say last week that they had numerous conversations or meetings with the Russian ambassador in Washington, Sergey Kislyak. ABC News revealed on Sunday that Kislyak was seen in a video attending a Trump speech at the Mayflower Hotel in Washington in April 2016. A White House official this week said, “To state they met or that a meeting took place [at the Mayflower] is disingenuous and absurd.”

One former senior Trump campaign aide told ABC News that no one in the Trump White House contacted former campaign aides to even ask if they’d met with Russian officials prior to the President and his spokespersons making numerous public denials this year that no one from the campaign had met with any Russians.

“They’re winging it, just like they did during the campaign,” the former senior Trump campaign aide said.

Most notably, last week Attorney General Jeff Sessions acknowledged he had two separate meetings with Kislyak, despite testifying at his recent Senate confirmation hearing that he had no meetings with the Russian government while advising the Trump presidential campaign last year. Democratic leaders have called for Sessions to resign; instead, he recused himself from overseeing the FBI’s investigation of Russian attempts to influence the election.

ABC News reported earlier this week that Clapper declined Trump’s Jan. 11 request that he publicly refute a dossier of salacious allegations about Trump and his campaign aides compiled by a former British government spy for a Washington political intelligence firm. His reason for declining to do that was that the report’s sources and allegations couldn’t be corroborated or even properly investigated.

“[The President-Elect] informed me directly that he believed all the information that was contained in the data of this dossier was false,” Clapper said.

Asked what parts of the dossier had been corroborated by “other sources”, Clapper said that the intelligence community was able to confirm that Putin hated former President Bill Clinton and former Secretary of State Hillary Clinton. He refused to comment further on the dossier.

Putin’s “rabid animus,” as Clapper called it, appears to stem from lingering Russian anger over the Clinton administration using military power to defend Bosnian Muslims in the late 1990s from Serbs aligned with Russia, one analyst said.

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