Joe Biden and Paul Ryan greet each other at the start of the vice presidential debate in Kentucky. | AP Photo

Vice President Joe Biden delivered an extraordinarily aggressive, top-to-bottom attack on the Romney-Ryan ticket Thursday, repeatedly interrupting and even laughing at Wisconsin Rep. Paul Ryan during the lone vice presidential debate of the 2012 campaign.

The debate was a head-snapping role reversal from last week’s first presidential debate in Denver, which featured a subdued Barack Obama and a combative, insistent Mitt Romney.

Read more in POLITICO.