President Barack Obama and Vice President Joe Biden unleashed a back-to-back assault Tuesday on Republican challenger Mitt Romney, re-emphasizing Democratic assertions that Romney as a venture capitalist sent U.S. jobs overseas and paid no heed to the impact on American workers.

"You've got to give Mitt Romney credit," Biden said while campaigning in Iowa. "He's a job creator in Singapore, China, India."

Obama, who was fundraising in Atlanta and Miami, cast his Republican rival as the type of wealthy investor whose only goal was making money no matter the cost.

"His basic vision is one in which if wealthy investors like him, folks at the very top are freed up from any kind of regulations, if they are maximizing their profits, even if they are polluting more, or offshoring jobs or avoiding taxes or busting union, whatever the strategy is — if they are doing well, then everybody else is automatically doing well," Obama told a crowd of Atlanta donors.