Just How 'Responsible' a Choice Is Tim Kaine?

In 2008, Barack Obama famously wanted a “team of rivals” in his administration. He began with his running mate, who was utterly unlike him. Obama was a political newcomer; Joe Biden was a Beltway veteran. Obama appealed to African Americans and upscale liberals; Biden appealed to blue collar whites. Obama was disciplined; Biden was unruly. Obama was cool; Biden was warm.