Salvation Army slaps a gay gag order on bell ringers.

December 22 2010: A Salvation Army soldier rings the bell for donations in midtown Manhattan during Christmas season. (Shutterstock)

“If you run into a Salvation Army bell ringer this Christmas season, don’t strike up a conversation about President Trump or gay marriage,” warns FOX News host Todd Starnes is telling his audience.

Starnes says employees “have been told to…