The Ku Klux Klan ran an anti-Catholic, anti-city, anti-immigrant hate campaign against the Catholic candidate in the 1928 presidential election. They said the Catholic pope would be ruling America from Rome if that candidate were elected. Who was the candidate? Herbert Hoover Warren Harding Calvin Coolidge Al Smith

Correct answer is Al Smith.

Explanation:

Herbert Hoover is not the correct answer as Hoover was a Republican candidate who won the election and became a 31st President.

Harding is not correct answer as he was a 29th President of United States, who died in 1923.

Coolidge is not correct as he was President between 1923 and 1929 and did not ran for re-election in 1928.

Al Smith is correct answer as he was a candidate of elections and was under the attacks of the Klan since 1925 when he acknowledge that he will ran for the President.