Ken Starr warns Trump: Firing Mueller would be an 'insult to the Founding Fathers'

President Donald Trump is still fuming about being investigated for obstruction of justice by Special Counsel Robert Mueller, but former Whitewater special prosecutor Ken Starr has a warning for him: You fire Mueller at your own peril.

In an editorial written for the Washington Post, Starr tells Trump that it would be an "insult to the Founding Fathers" if he fired the man who is leading an investigation into him and his presidential campaign.

"Absent the most extreme circumstances, the president would be singularly ill-advised to threaten, much less order, Mueller’s firing," Starr writes. "The official processes now under way should continue unimpeded. Let the legislative and executive branches fulfill their respective roles, ordained at the founding and matured by the wisdom of sobering experience gained over the course of seven generations."

Starr is best known for his work investigating former President Bill Clinton in the 1990s. Starr's report on Clinton's conduct, which detailed his affairs with former White House intern Monica Lewinsky, led to the president being impeached in the House of Representatives.