After calling on reporters to investigate "how pervasive" talk is among top GOP officials and members of the military about President Trump's ability to lead, Carl Bernstein noted on Thursday that he is seeing progress as prominent Republicans are openly defying the president.

Bernstein shared an article about Sen. Bob Corker, R-Tenn., about him saying on Thursday that Trump hasn't demonstrated the "competence" or the "stability" he needs to succeed.

"Important Republicans perhaps not so private anymore re: @realDonaldTrump's "stability" and fitness to be POTUS," Bernstein tweeted.

Earlier in the week, Bernstein, best known for his investigative reporting that shed light on the Watergate scandal leading to former President Richard Nixon's resignation in 1974, said there is private chatter among top Republicans, conservatives and intelligence and military leaders questioning Trump's fitness to be commander in chief.

"Reporters should find out how pervasive such talk may be," he said.

As Trump has waffled on his willingness to condemn, by the name, the white nationalists and neo-Nazi groups involved in last weekend's violent clash with counter-protesters in Charlottesville, Va., several Republicans have joined Democrats in condemning him.

Of those Republicans who have come out and told the media about their dismay with the president was Sen. Tim Scott, R-S.C., who told Vice News that Trump's 'moral authority is compromised' after his latest Charlottesville comments on Tuesday, when he said there is "blame on both sides."