Sven, a priest in Tautenhain in Saxony, has remarried and has joined the party of Angela Merkel's CDU.
He finds the policy of AfD unacceptable to his beliefs.
Frauke Petry too has remarried.
There is a State election today in Saarland, which is the smallest of the German federal states.
The new leader of the SPD and the party's chancellor candidate for the September Federal elections, Martin Schultz, is now neck-and-neck with Angela Merkel and her CDU CSU coalition.