Here is video from Politico that breaks down the Massachusetts Senate Race. They characterize today's elections as "a 10 on the Richter Scale" politically.
One pundit said if Brown wins, the GOP will see this as a sign they can win big in November as well. It was also mentioned that if Brown wins today, it will be interesting to see if we see a wave of mass retirements by Democrats on Wednesday, deciding not to seek re-election in November.
Mike Allen said it is still possible a huge turnout will swing things Coakley's way since Democrats have a 3 to 1 advantage in Massachusetts.