Campaign update: Lamont for Sestak, White House lending a hand

At noon today, Ned Lamont will endorse Rep. Joe Sestak (D-Pa.) in his primary with Sen. Arlen Specter (D-Pa.). Lamont was the last Senate candidate to beat an incumbent in a primary, though Sen. Joe Lieberman (I-Conn.) went on to beat him as an independent in the general election.

Check out today’s story from Sam Youngman and me about the uptick in fundraisers featuring President Obama and Vice President Biden.

It appears a Chamber of Commerce poll showed Florida Gov. Charlie Crist (R) leading Senate primary opponent Marco Rubio just 44-30 – a much closer race than early polling has indicated. Those numbers weren't released with the poll, but have since leaked.

Much of Rubio's $1 million third-quarter haul came from in-state, rather than conservatives from around the country. If he can add them to the fold, he could raise lots more.

Can Rand Paul actually win Kentucky’s open Senate seat?

Sen. Jim DeMint (R-S.C.) has a 2010 opponent.