Donald Trump can feel the breath on the back of his neck. Aggressive federal investigators — in the Russia case and a separate inquiry of his lawyer’s behavior related to women who have alleged consensual sexual relationships with Trump — are taking ever more bold actions.

They are getting closer to knowing things that I am sure Trump thought no one but the parties involved would ever know.

This has frightened and enraged the president.

There are reports that Trump is thinking of ways to thwart or constrict the Robert Mueller investigation, including the possibility of firing and replacing Deputy Attorney General Rod Rosenstein, to whom Mueller reports.

As The New York Times has reported, Trump has at least twice sought to fire Mueller.

The first time was last June “amid the first wave of news media reports that Mr. Mueller was examining a possible obstruction case,” and the most recent was in December when Trump became “furious” over “reports that the subpoenas were for obtaining information about his business dealings with Deutsche Bank.” Those reports about the subpoenas were not correct and Trump backed down.