Which group joined the anti-Catholic campaign against presidential candidate Al Smith?

AAmerican Federation of Labor
BLeague of Women Voters
CKu Klux Klan
DAudubon Society

Verified Answer :

The group that joined the anti-Catholic campaign against presidential candidate Al Smith is theĀ Ku Klux Klan.

The Ku Klux Klan (KKK) tried their best to prevent Al Smith, an American statesman who happened to be Catholic, from winning the presidential debate. Although Smith did not win, Roosevelt elected Smith to governor New York.

Ku Klux Klan is your answer. :)