According to Public Policy Polling's (PPP) latest survey of Kentucky voters (conducted Dec. 12-15 with a margin of error of ±2.5 points,
pdf), President Barack Obama and Senate Minority Leader Mitch McConnell area neck and neck when it comes to job approval ratings:
Approve/disapprove (April 2013 results)
Barack Obama 31/64 (35/62)
Mitch McConnell 31/61 (36/54)
If there's any good news in these approval numbers for McConnell, it's that President Obama disapproval rating is slightly higher. But given that Kentucky is one of those red states where voters wouldn't approve of President Obama's job performance even if he walked on water, that's a pretty small consolation indeed.
Meanwhile, in the survey's horse race numbers, McConnell leads his GOP primary challenger Matt Bevin by a 53-26 margin, while both McConnell and Bevin lead Democratic candidate and Secretary of State Alison Lundergan Grimes by one point (McConnell is up 43-42 and Bevin is up 39-38). Those general election numbers are actually pretty good for Bevin, because as long as they hold, they rob McConnell of the ability to make an electability argument.
As far as the primary is concerned, 27 points seems like a huge margin, but unlike general election voters, primary voters can change their mind quickly, and even though McConnell would clearly win if the election were held today, the primary is still five months away. (For example, former Indiana Sen. Dick Lugar lost his renomination battle despite leading his opponent by a 49-28 margin seven months before his primary.)
h/t: @RussOnPolitics