All the people saying that Senators are inherently unelectable and have too much baggage to win a national campaign.
They ignore the fact that senators have the expertise necessary to actually govern, while governors clearly do not have the ability to actually be effective on the national scene. They bring in their local junta, piss off everyone, and take several years to actually have a reasonable rapport with Congress.
There are several reasons why Kerry lost the election, the fact that he was formerly a Senator are not amongst them!