A relieved Romney pumps up crowd

A relieved-looking Mitt Romney put the focus back on the general election in his victory speech after winning Michigan and Arizona Tuesday night.

Romney fed off a raucous crowd in Michigan, leading them in an impromptu call-and-response while touting his agenda and slamming President Obama's policies.

"We didn't win by a lot but we won by enough, and that's all that counts," Romney said triumphantly.

The speech showed Romney at the most relaxed he's appeared in weeks. After his wife, Ann, said she'd been to "the tip of the mitt," referring to the eastern "thumb" part of Michigan, she blushed a bit as he jokingly patted himself on the head.

Romney ignored his primary opponents, taking the attack to Obama during the speech and focusing exclusively on the economy and promising to keep his focus on jobs.

"I'm going to deliver on more jobs, less debt and smaller government," he promised. "We're going to hear that day in and day out."

After Romney rhetorically asked if Obama fixed the economy, he seemed a bit surprised when the audience shouted back "No." But he rolled with it, working the crowd's energy up.

"Did he tackle the housing crisis? Did he get America back to work? No," Romney said.

Later, Romney drew direct contrasts with Obama.

"He lost our AAA credit rating. I'll restore our AAA credit rating. He rejected the Keystone pipeline. I'll get us that oil from Canada that we deserve," Romney said to strong cheers. "This president wants to raise your taxes. I'm going to cut them."

Romney exited to strong applause. Super Tuesday is one week away, and Romney heads into this crucial week with a bounce in his step.