Sen. Chuck Grassley, R-Iowa, called President Obama “stupid” today, which resulted in Obama campaign strategist David Axelrod comparing the senator to a 6-year-old child.

“Constituents askd why i am not outraged at PresO attack on supreme court independence. Bcause Am ppl r not stupid as this x prof of con law,” Grassley tweeted Saturday in his inimitable way. Translation: “Constituents asked why I am not outraged at President Obama’s attack on Supreme Court independence. It’s because the American people are not as stupid as this ex-professor of constitutional law.”