So says the latest tracking poll, which has Joe Sestak leading Arlen Specter by 46% to 42%. (PDF)

If you assume that the numbers go the wrong way for Sestak on the margin of error (±5%), and figure in the 2:1 undecideds going for the challenger, then Specter wins a 51%-49% victory, but this is really grim for Specter, and the numbers also now appear to imply that Sestak is stronger in the general election against Neanderthal Pat Toomey.^*

Basically, Sestak has started hitting Specter as being a political opportunist, and it works because it’s true.

Here’s hoping that Blanche Lincoln suffers the same fate.

^*My apologies to Neanderthals for the comparison.