WASHINGTON — They are many, shift between parties and typically side with the candidate who ends up winning the White House.

That’s what makes Catholics the ultimate swing voters in the U.S. And this year they are going to throw their weight behind Democrat Hillary Clinton, a panel of political analysts said Oct. 31.

Catholics favor Clinton over Trump 51 to 40 percent, according to a recent survey from the Public Religion Research Institute, which co-sponsored the panel at the National Press Club.