WASHINGTON - Republican US presidentialcandidate Mitt Romney has picked Congressman Paul Ryan as hisvice presidential running mate, the Romney campaign confirmed onSaturday.

"Mitt's choice for VP is Paul Ryan. Spread the word aboutAmerica's comeback team," a Romney campaign app said, confirmingwidespread reports he had selected the 42-year-old Wisconsinlawmaker who chairs the US House of Representatives BudgetCommittee.