Bernstein warns Trump against ‘trying to sabotage’ Mueller investigation
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Veteran journalist Carl Bernstein suggested on Friday that President TrumpDonald John TrumpDem lawmaker says Electoral College was 'conceived' as way to perpetuate slavery Stanley Cup champion Washington Capitals to visit White House on Monday Transportation Dept requests formal audit of Boeing 737 Max certification MORE has been trying to sabotage special counsel Robert Mueller's probe into alleged ties between the Trump campaign and Russia. 

"There are very serious allegations accepted by the intelligence leaders of the United States, including those under Donald Trump. The Russians interfered in our electoral process, and there is an investigation into whether Donald Trump and those around him had foreknowledge of those attempts, and what their relationships were with Russians, business relationships that might have made them vulnerable to Russian objectives," Bernstein told CNN's Don Lemon on "CNN Tonight."

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"That's what Mueller is investigating. And he ought to be able to have the opportunity, without the president of the United States trying to sabotage his investigations, to follow through. If there is nothing there, Robert Mueller has every ability and he's called on to deliver a report," he continued. 

Bernstein's comments come after CNN reported that a federal grand jury in Washington, D.C., had filed the first charges in Mueller's probe. 

The charges are sealed under a federal judge’s order, with sources telling CNN that those charged could be taken into custody as soon as Monday.

Trump posted a video on Twitter soon after CNN reported the development, quoting an opinion piece in the New York Post suggesting that his former Democratic challenger Hillary Clinton may have colluded with Russia and sought to frame Trump as a "traitor." 

Trump and his allies have seized on two congressional probes looking into Clinton's handling of classified information and the U.S. sale of a uranium company to Russia while she was secretary of State. 

The president tweeted early on Friday that it was "commonly agreed" there was no collusion between Russia and the Trump campaign, but there was instead collusion between Russia and Clinton.