If his new aggressiveness lasts, it’s a sign of good things to come in November. Defense wins football games, but only offense wins elections. Republicans, who instinctively prefer drawing-room niceness, often have trouble getting their heads around that.

Instead of continuing to playing the sucker in the Bain blame game, endlessly trying to explain away his success in making money — which has always been the national pastime — the Republican challenger is finally taking the fight to the president, taking due note of what a new campaign commercial calls “a perverted form of crony capitalism during his first 3½ years in office — to the detriment of the American middle class.” …

This burst of aggressiveness followed one of his best speeches so far, to the national convention of the NAACP, telling the delegates bluntly why he intends to repeal Obamacare. Nevertheless, he said, he and not Mr. Obama is really the One they have been waiting for. “If you want a president who will make things better in the African-American community, you are looking at him.” No cheers, but when the scattered booing subsided, he pressed on: “You take a look.”