Claims of "unelectable" are always made with arrogance, ignorance or malice.
In the spirit of full disclosure I am a Ron Paul supporter, but I could be speaking for thousands of candidates in hundreds of races in our recent history.
Look no further than Newt Gingrinch who just nine months ago, his campaign in disarray was left for dead. Smelling salt technology has obviously come a long way. Then there is Rick Santorum, never really alive in this race, (polling at sub 5% for MONTHS) comes out of nowhere and pulls off a tie (delegates) in Iowa.
Why should you listen to a pundit, the media or anyone else with regard to electability? At best they are usually wrong and at worst they are intentionally trying to lead you in a certain direction. Listen to the candidates, scrutinize their records (for yourself) and choose the one who most closely aligns to your way of thinking.
Electability is determined on election day and not before. What makes an individual electable or not is in each of our hands, one by one our votes are counted and count they do. We should replace our own judgement with someone else's... never.