This comes as four Republican presidential candidates will face off at a debate in Detroit, Michigan, tonight—after neurosurgeon Ben Carson said he would not participate in tonight’s debate and that he does not “see a political path forward.” Carson has failed to win a single state’s primary or caucus. Speaking Tuesday in Baltimore, Dr. Carson gave his diagnosis of the political system: rotten to the core.

Dr. Ben Carson: “As I’ve had an opportunity to really study our system, it has become a little bit discouraging seeing all the relationships that exist there. It is rotten. It is rotten to the core on both sides, Democrats and Republicans. … The political class and their minions, which includes much of the media, you know, they don’t like it when someone challenges their authority.”