Because the latest polling from the right leaning Rasmussen polls has him tied with Democrat Alison Lundergan Grimes:

Senate Minority Leader Mitch McConnell (R-KY) is tied with his Democratic opponent, Alison Lundergan Grimes, at 42 percent each in a new poll by conservative-leaning firm Rasmussen Reports.

Six percent preferred neither of them, and 10 percent were undecided, according to the survey, which was released Monday.

Rasmussen’s polls came under fire during the 2010 and 2012 election cycles for regularly overstating the standing of Republican candidates.

Note that undecideds tend to break for the challenger. (Happy dance!!)

If I were a Democratic political consultant right now, I would be using these numbers to push Matt Bevin, the teabagger running against McConnell in the primary.

What McConnell has going for him, both in the primary and the general, is the sense of inevitability that he intends to convey.

Drive a stake through its heart.