I don't think Donald Trump would have been elected president had he not been preceded by Barak Obama.  President Trump was the leader of the "Birther" movement during Obama's candidacy and presidency.  He campaigned as virtually the anti-Obama.  Where Obama came off as an intellectual, a college professor, a chablis sipper who wouldn't be found drinking beer and cheering raucously with the guys for a sports team (regardless of his actual behavior in such circumstances),  Trump was one of the boys.  Obama was a social liberal, a supporter of gay rights, and women's rights, including women's right to choose abortion.  Neither of these positions really resonates with many traditional Catholics, who are very happy that Trump says he has had a conversion of conscience regarding abortion and would appoint pro-life justices to the Supreme Court.  I also wonder how many conservative Catholics really believe that President Obama was a secret Muslim.