Franklin Roosevelt invites Father John A. Ryan to deliver the benediction at his 1937 inauguration. 

Franklin Roosevelt invited Father John A. Ryan to deliver the benediction at his 1937 inauguration.  Ryan had been an advisor to FDR and members of his cabinet since he had been elected to office in 1932. 

The story behind the benediction invitation is told here:

Catholics and Politics: Father John A. Ryan and Franklin D. Roosevelt: http://cuomeka.wrlc.org/exhibits/show/politics