Conversation so far:
how many presidents of the united states were catholic
The only United States President who was catholic was John F. Kennedy.
what is the most common religious affiliation of us presidents
Protestants predominate as affiliations of presidents of the United States.
Were there any atheist United States Presidents?
No president has openly identified as atheist.
how about were there any no denominational or religious affiliation united states presidents
Three presidents—Thomas Jefferson, Abraham Lincoln and Andrew Johnson—had no denominational or religious affiliation.

Question: Did religion ever become an issue?
Self-contained rewrite: Did religion ever become an issue for United State presidents?