IRWIN, Pa. – A fiery Mitt Romney on Tuesday accused President Barack Obama of believing the government is more vital to a thriving economy than the nation’s workers and dreamers, scrambling to get back on message by declaring of Obama, “I’m convinced he wants Americans to be ashamed of success.”

The new Romney approach came as Democrats pressed for the release of more of Romney’s tax returns and hounded the Republican candidate over discrepancies in when he left his private equity firm. The conservative magazine National Review urged Romney to release more of his tax records.

Obama has been trying to keep Romney focused on matters other than the sluggish economy, even releasing a single-shot TV ad Tuesday that suggests Romney gamed the system so well that he may not have paid any taxes at all for years.