And Walker? He was at a dinner in New York with supply-side economists this week, explaining how he can do for the nation what he did for Wisconsin.

That dinner Wednesday, at New York’s 21 Club, is where Giuliani challenged Obama’s love of country. Even the former mayor preceded his outrageous allegation by saying, “I know this is a horrible thing to say . . . ”

Walker surely knew it was horrible, too, but he refused to say so — and in this failure he displayed a cowardice unworthy of a man who would be president.