Burlington, Iowa (CNN) Playing to Hawkeye State evangelical voters, Donald Trump riffed on religious political correctness at an event here Wednesday by vowing to always say "Merry Christmas" come the winter holiday season.

"I'm a good Christian," the Republican presidential front-runner said. "If I become president, we're gonna be saying Merry Christmas at every store ... You can leave happy holidays at the corner."

Trump supporters in the room said it was precisely Trump's aversion to political correctness that attracted them to the colorful candidate.

"He actually says what I want to hear and he's not worried about telling somebody or saying it in a way that doesn't sound real," said Cynthia Forth, a 60-year-old from Crawfordsville, Iowa. "I want to hear (it) straight. He'll give it to you straight."

Trump on Wednesday also reveled in Vice President Joe Biden's decision not to run for president, telling supporters in Iowa: "He did the smart thing."

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