For the most part, I think Rush Limbaugh is better ignored. He’s a shameless liar who has helped turn incivility into the national past-time, a demagogue who has done more than his share to divide the body politic. And made hundreds of millions of dollars doing it. But his utterly classless mocking today of a visiting dignitary — Chinese President Hu Jintao — ought to embarrass many of Limbaugh’s ardent fans. While Limbaugh frequently engages in race-baiting, his performance today was a low ebb even for him. Commenting on the fact that Fox didn’t immediately provide translation during Hu Jintao’s...