Voters in Massachusetts will vote for a new Senator tomorrow: The two candidates vying for the seat long-held by Democrat Ted Kennedy are now polling in a dead heat. The seat could be the key 60th vote needed for Democrats to pass a health care bill in the Senate... or the key to Republicans' efforts to stymie it.

Will Ted Kennedy's Senate seat be filled by another Kennedy? Both Joe, Robert Kennedy's son, and Vicki, Ted's wife, have been mentioned as possible successors, but how well would they fare in a special election? We ask longtime Boston journalist Christopher Lydon. He's a former public radio host who ran for mayor of Boston in the early 1990's.

We talk to Chris Lydon, former host of NPR's The Connection and creator of Open Source radio. He has covered Senator Kennedy throughout his years as a reporter. We also talk with Jeff Zeleny, White House correspondent at The New York Times who is on Martha's Vineyard waiting for President Obama to speak about Kennedy's death and legacy.