“He’s the president of the United States. You don’t say, ‘You’ll get your chance.’”

After the clip ended, Matthews seemed appalled. “I don’t think [Romney] understands the Constitution of the United States,” Matthews said. “He’s the president of the United States. You don’t say, ‘You’ll get your chance.’”

Now, it’s entirely possible for one to think Romney was rude to Obama during that moment in the debate. A president is of course entitled to some deference, and some people undoubtedly thought Romney was insufficiently deferential. Others thought Romney’s behavior was entirely acceptable. But just for the record, there is nothing in the Constitution barring one from saying “You’ll get your chance” to the President of the United States — no matter what his supporters on MSNBC say.