US President Donald Trump's aides struggle to defend his wiretap claims

The White House today attempted to defend US President Donald Trump's unfounded claim that former President Barack Obama wiretapped Trump Tower near the end of the presidential campaign.

It sent out several Administration officials to reiterate the assertion without providing supporting evidence.

In tweets over the weekend, Trump claimed he had "just learned" that Obama wiretapped his midtown Manhattan skyscraper, where he lives and which housed his presidential campaign - accusing the former president of a potentially illegal act and writing that Obama was a "bad (or sick) guy".

Trump has since provided no proof to back up his assertion, which has been refuted by Obama, FBI Director James Comey and former director of national intelligence James Clapper.

Today, senior Administration officials contorted themselves trying to defend the President's claims, which seemed to emanate largely in response to a rant on conservative talk radio and in an article on Breitbart News, the conservative website that Stephen Bannon, Trump's chief strategist, used to lead.

He refused to add clarity or context to Trump's Twitter missives, saying neither the President nor the White House would comment further until the congressional investigations are completed.Speaking to reporters from the White House briefing room without cameras present, White House press secretary Sean Spicer referred reporters to his weekend statement calling on the House and Senate intelligence committees to investigate the wiretapping charges as part of their broader probe of alleged Russian interference in the 2016 presidential election.

"I'm just going to let the tweet speak for itself," Spicer said. "I think the President speaks very candidly."

Spicer, citing news reports, said there was sufficient evidence to warrant further investigation at the congressional level.

"I think that there's no question that something happened. The question is, is it surveillance, is it a wiretap or whatever?" Spicer said. "But there's been enough reporting that strongly suggests that something occurred."

Asked whether he could unequivocally say that Trump's tweet was based on more than a talk radio report and the Breitbart article, Spicer declined, again referring to his calls for the intelligence panels to take the lead.

Asked about the specific sourcing behind the President's tweets, Spicer said there were several options: "It could be FISA, it could be surveillance," he said, referring to the Foreign Intelligence Surveillance Act, under which a secret court can issue warrants for electronic surveillance on potential spies or terrorists.

If there was a FISA wiretap of Trump during the campaign, it would mean that the court had found there was probable cause to believe he was acting as an "agent of a foreign power," as the law requires.

Nixon counsel John Dean on @MSNBC-"This is not Nixon/Watergate. In fact it's very confusing as to whether Trump even understands Watergate." pic.twitter.com/ZWg5ZJtiFO

— Kyle Griffin (@kylegriffin1) March 7, 2017

In perhaps the clearest sign of the uncomfortable situation the President's tweets created for his aides, the normally media-hungry White House went largely dark today. Although several top officials did defend Trump in TV interviews, Spicer did not allow cameras into the briefing room for his news conference, and Trump signed an executive order for his revamped travel ban in private.

Speaking on NBC's "Meet the Press", Clapper did provide the White House with a bit of cover, saying there was "no evidence" of collusion between Trump and Russia during the campaign.

But he also undercut the President's assertion that Obama had wiretapped him, saying, "There was no such wiretap activity mounted against the president-elect at the time as a candidate or against his campaign."

Clapper told ABC that Trump in a phone call asked him to rebut the dossier compiled by a British former MI-6 spy, Christopher Steele.

"His main concern was, I think he asked me to put out a rebuttal or repudiation of the dossier which I couldn't do and didn't," Clapper told ABC News.

Spicer urged reporters to note Clapper's comments about an apparent lack of collusion, but gave less weight to his remarks refuting Trump's claims of wiretapping. Asked about the difference, Spicer said, "He said that he wasn't aware of anything. I take him at his word that he wasn't aware, but that doesn't mean that it didn't exist."

Victor Davis Hanson: Why should we believe the anti-Trump press? | Opinion https://t.co/2hniU9BBYV pic.twitter.com/zfZ8Tw4Vqo

— Newsweek (@Newsweek) March 7, 2017

This reverse-engineering of evidence has happened before, as when the President declared erroneously that his inauguration crowd was the largest in history and when he claimed without evidence that at least three million undocumented immigrants illegally voted for Hillary Clinton in the general election.

The public face of this latest effort has mostly been deputy press secretary Sarah Huckabee Sanders, who was dispatched to a news show - even though Spicer and chief of staff Reince Priebus usually take that task - and to two talk shows.

Sanders admitted that she had not discussed the matter with the President, and she lacked answers to questions. When asked today by ABC News' George Stephanopoulos whether the president accepted that Comey had refuted his tweets, Sanders responded: "You know, I don't think he does."

Like Spicer, Sanders claimed Trump's accusations are supported by news media reports, even though a list of such articles provided by the White House contained no such evidence. She also attempted to recast the President's words with a softer tone.

Hayden: "The new executive order is a far better implementation of what is still a fundamentally a flawed policy" https://t.co/y9Vc6OJdpc

— Anderson Cooper 360° (@AC360) March 7, 2017

"Look, the President firmly believes that the Obama Administration may have tapped into the phones at Trump Tower," Sanders said on NBC. "This is something that we should look into. We'd like to know for sure."

Sanders repeatedly urged that the press and others give the President the same benefit of the doubt that they seemed to be giving to those accusing the Trump campaign of coordinating with the Russian Government.

"Look," Sanders said. "I haven't had the chance to have the conversation directly with the president, and he's at a much higher classification than I am, so he may have access to documents that I don't know about, but I do know that we take this very seriously."

White House counselor Kellyanne Conway followed a similar script on Fox News saying there have been numerous media reports that there was "politically motivated activity all during the campaign and suggesting that there may be more there".

"He's the President of the United States," Conway said. "He has information and intelligence that the rest of us do not. And that's the way it should be for presidents."