(CNN) Attorney General William Barr has told people he's considered resigning over President Donald Trump's interference with Justice Department matters, particularly the President's tweets, according to a source close to the situation.

While it's not clear if Barr is serious about potentially resigning or looking to send Trump a message, those discussions punctuate a palpable tension between Trump and Barr in recent days after the Justice Department was roiled by a cascade of controversies this past week, a separate source said, adding that the two appear to be in a cooling-off period after Barr's remarkable interview with ABC News.

"I think they have calmed down. I think they're cooling off," the source said.

Barr has been frustrated with the President chiming in on federal law enforcement matters in recent weeks, which he has made clear privately to Trump, though people close to the President said it's unlikely he will stop and pointed out that Trump weighed in on Justice Department issues long before Barr took the job. So far, Trump has ignored Barr's requests to stop weighing in, though some inside the administration have raised questions about whether the attorney general is seriously considering resigning or simply attempting to send a message to Trump.

Barr is also not the first of the President's top aides to threaten his resignation after a disagreement with him; former chief of staff John Kelly did similar on multiple occasions, according to several officials.

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