"PPP's newest Kentucky poll finds that Mitch McConnell is the least popular Senator in the country and as a result Alison Lundergan Grimes is remaining very competitive with him, even as Democrats have struggled nationally over the last couple months."
From a Hot Air article:
"Three of the four Kentucky polls taken so far this year have come from left- or right-leaning pollsters but the topline numbers have been roughly consistent. Two have McConnell up by one, one has the race a dead heat, and the fourth has Grimes up by four."
"Solution: Nominate Matt Bevin instead? He does roughly as well against Grimes as McConnell does (trailing by two instead of leading by one) and some polls have shown him outperforming him in the general against her."" (emphasis added)
So if Bevins has a better chance of beating the Democrat in the general election, it would make sense to support him in the primary. I frankly do not understand why the polling shows McConnell so far ahead of Bevins.