WASHINGTON – Documents filed by Mitt Romney's former company conflict with the Republican presidential candidate's statements about when he gave up control of the private equity firm Bain Capital. President Barack Obama's campaign seized on the discrepancies Thursday to charge that Romney was lying about his background.

Romney, in turn, said Obama was the one being dishonest, rolling out a hard-hitting television ad that accused the president of launching "misleading, unfair and untrue" attacks about the Republican's role in outsourcing U.S. jobs.

"When a president doesn't tell the truth, how can we trust him to lead?" the narrator says in the Romney ad titled "No Evidence."