Republicans love Paul Ryan, his conservatism and the contrast he offers to the businesslike Mitt Romney. On Wednesday, he left them rapturous with attacks on President Barack Obama.
"What's missing is leadership in the White House ... The man assumed office almost four years ago - isn't it about time he assumed responsibility?"
Ryan's speech accepting the party's nomination was wildly cheered on as he attacked the president using a mix of policy and putdowns in a folksy style.
As Romney's wingman, his main job is to lead the attack on Obama, letting the latter worry about selling the ticket. And Ryan was bang on target.
The hall frequently erupted into wild cheering and clapping - and even managed a few collective snorts at some of his jokes aimed Obama.
He got a few playful hoots when he contrasted himself with Romney saying they are a generation apart. Romney listens to music "I have heard on campaign buses and hotel elevators."
"He actually urged me to play some of these songs at campaign rallies. I said, I hope it's not a deal-breaker Mitt, but my playlist starts with AC/DC, and ends with Zeppelin."
But Ryan might have gone a little overboard with facts in his attacks on Obama, as his campaign was quick to point out, within minutes of the speech.
Ryan said a GM plant in his state, Wisconsin, closed within a year of Obama's promise that he will not allow it. The plant actually shut down during President George W Bush's time.