On the contrary, it would hurt McCain to completely disregard GWB.
Do you all remember, when McCain was behind in the poll during the primaries, the MSM keep spitting out garbages like: “Support for Iraq WAR is hurting McCain chance...”
Just remember, everything the MSM is trying to do these days is to depress the Republican base, to suppress voter turnout.
Having said that, every conservatives with good conscience also know that for the past decade the Republican party is not doing anything worth our votes. I don’t see myself voting for Republicans, I am voting only to defeat the left wing crooks.