Ann Coulter's advice to Chris Matthews: "Pace yourself. It's a long way to Election Day. If you get too crazy, too soon, you'll have nothing left for the fourth quarter."

Today, we will focus on the outstanding individual performance of the man who, since the departure of Contessa Brewer, is widely regarded by his colleagues as the stupidest on-air personality at MSNBC. Ladies and gentlemen, I give you Chris Matthews.

Appearing on "Morning Joe," Matthews exploded at Republican National Committee chairman Reince Priebus, alleging that Mitt Romney's harmless birth certificate joke from a few days earlier was a "cheap shot," "awful," and an example of the Republicans playing "that card."

...

Matthews said that Romney's (factually correct) claim that Barack Obama is weakening the work requirement for welfare was "playing that card," fuming at the RNC chair,...

...

The next night on "Hardball," Matthews made his most dramatic announcement yet! It seems the mention of "Chicago" in relation to the president is also a racist dog whistle.

Matthews: "They keep saying Chicago, by the way, you noticed?"?

Guest John Heilemann, like an orderly in a mental institution trapped alone with a patient, played along, responding, "Well, there's a lot of black people in Chicago" -- while frantically jabbing at the alarm button.

Read the whole thing.