Romney's Balancing Act

It's a working vacation for Governor Mitt Romney this week at his family's home in New Hampshire.

It's one of dozens of out-of-state trips Romney has taken this year, as he weighs a possible presidential run.

For a look at how the governor is balancing his current job with his potential presidential bid, we're joined by Boston University history professor Julian Zelizer. He's author of "On Capitol Hill: The Struggle to Reform Congress and its Consequences" and editor of "New Directions in American Political History."