I found this interesting: http://www.huffingtonpost.com/2011/07/14/bachmanns-former-church_n_899353.html

I couldn’t believe the Wisconsin Synod would still teach this, so I looked it up on their website, and sure enough, they feel one is not a confessional Lutheran if one does not agree that “the Papacy” is the anti-Christ! For those unfamiliar with the Lutheran community, WELS is a conservative Lutheran body of 390,000 in the U.S, separate from the ELCA. The ELCA does not teach that the Pope is the anti-Christ.

http://www.huffingtonpost.com/2011/07/14/bachmanns-former-church_n_899353.HTML

The Iowa Synod joined the ALC which joined the ELCA.