It's Vice President Joe Biden versus Republican presidential candidate Mitt Romney after Biden made some comments on the campaign trail Tuesday that Romney's not happy about.
FOX News Radio's Rich Johnson reports from Washington:
Yesterday in southern Virginia, Biden riffed on Romney's stated desire to unchain Wall Street. Biden saying Romney would put people back in chains. And after Romney called that 'outrageous', Biden came back with no apology.
(Biden) "If you want to know what's outrageous, it's their policies and the effects of their policies on middle class Americans. That's what's outrageous!"
After days of defending the choice of Paul Ryan as running mate, a campaign official says Biden's comments allow the Romney camp to go on the offensive.
In Washington, Rich Johnson, FOX News Radio.