President's power to pick next Supreme Court justices keep some Catholics on board the Trump campaign.

Donald Trump is seeking to woo Catholics via a letter writing campaign.

"We want to let Catholics all throughout the state know that the death penalty is not necessary to protect public safety," Tom Venzor, head of the Nebraska Catholic Conference, said at a press event on Sept. 29.

A question about the candidates' faith provoked a conversation about how political figures should balance religious beliefs in the public square.

American Catholics translate to about 20 percent of all registered voters, but they may have an outsized effect on Trump's chances.