New York-New York?

Taegan Goddard notes that Republicans and Democrats rate Giuliani and Clinton - respectively - as the most electable candidate of their party in 2008. Both lead their closest competitors by wide margins.

While both face serious challenges in their party's primaries, this perception is going to push primary voters hard. Each side will see that the other's perceived leader is a real threat to win, and that will make it harder to vote with their hearts, rather than their heads.