President Donald Trump is considering firing Deputy Attorney General Rod Rosenstein as a check on special counsel Robert Mueller,  according to CNN .  Newsy previously reported  that Trump can't fire Mueller, but he can fire Rosenstein.

Sources told CNN the move would be a way to put boundaries around the Russia investigation, which the president considers "unregulated."  Trump's ire follows reports Rosenstein  personally signed off  on an FBI raid of Trump's lawyer's office.

Just because Trump can't fire Mueller directly doesn't necessarily mean he hasn't thought about it.  The New York Times reported  Trump raised the idea of having Mueller fired again in December after being talked out of doing so in June.