"It's extremely uncomfortable" to be a senior adviser inside the White House and be at the center of such an investigation, he told CNN's John Berman.
The most significant new revelation is that Jared Kushner, the president's son-in-law, is now a focus of investigation. Shortly after the election, Kushner allegedly discussed setting up a secret communications channel with the Russian government to facilitate sensitive discussions about the conflict in Syria.
In an editorial, the newspaper said that Kushner's dealings with Russian officials suggest that the adviser, "who had no experience in politics or diplomacy before Mr. Trump's campaign, is in way over his head".
The president, however, says he has "total confidence" in Kushner, and the White House has sought to minimize the meeting as normal diplomacy. "And in fact the Trump presidency has even talked about expanding sanctions against Moscow over Ukraine, and so this is tougher language than what we saw coming out of Obama". Rather, this would be secret communications using an adversary's equipment.
Trump tweeted Tuesday: "Russian officials must be laughing at the USA & how a lame excuse for why the Dems lost the election has taken over the Fake News". "Very bad for U.S. This will change".
First there was Paul Manafort, and then Michael Flynn.
The barrage of revelations has been felt by Trump's allies.
Trump didn't have to remove White House Communications Director Mike Dubke.
Over the weekend, White House National Economic Council Director Gary Cohn - who was the second-in-command at Goldman Sachs before joining the White House - declared the president's economic development deal with Saudi Arabia to be unlike anything he had seen in his 30 years in business.
Republicans on the House and Senate Intelligence Committees have relented and agreed to issue subpoenas to Flynn while ignoring his request for immunity.
What they're telling the world is that if another figure like Trump emerges promising to upend USA alliances and run a rogue, untrustworthy administration, one of America's two political parties will welcome him, and help him get away with it.
In addition to those four subpoenas, the committee has issued three others - to the National Security Agency, the Federal Bureau of Investigation and the CIA - for information about requests that government officials made to "unmask" the identities of United States individuals named in classified intelligence reports, according to a congressional aide.