Despite the Socialist in the name, the CSU is (on average) socially and culturally to the right of the CDU, and Seehofer (social wing) lost out to Huber (liberal wing) for the party leadership contest, while the Bavarian PM is Beckstein (conservative wing). Though I have to qualify that by noting that the vote was by delegates, in a rather top-down-ruled party, while Seehofer is said to be more popular at the base. Still, Seehofer joins the SPD (when fish falls from the sky) before the CSU joins a coalition left of the CDU...

_{*Lunatic*, n.
One whose delusions are out of fashion.}