Arriving at the Episcopal Church of Bethesda-by-the-Sea in Palm Beach - around 70 miles north of Miami - the president was greeted by Reverend James R Harlan as around 100 people lined the street to watch the motorcade yesterday.
Mass began before the Trumps arrived, and Harlan had asked the congregation to put any phones and cameras away, describing them as an "intrusion."
"We're here to worship," he said.
Seated in the third row, Trump listened to Harlan's sermon, which centered on the power of words.
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"Your words can have as much destructive potential as they do healing," Harlan said. "God's word is pure light."
A crowd lined up to shake Trump's hand during the peace- be-with-yous -- while the church's livestream cut to another angle as he stood up to take communion.
Trump, who was accompanied only by his wife Melania, departed the church after midnight local time (1030 IST), arriving back at Mar-a-Lago shortly before 12:30 AM today.
"What would you like more than anything?" the president asked one child.
After the child responded, Trump said: "Building blocks, that's what I've always liked too. I always loved building blocks."
Later in the evening, they enjoyed a Christmas Eve dinner menu which included turkey, beef tenderloin and seafood, along with side dishes such as creamy kale, popovers and mashed potatoes.
Trump also took to Twitter to wish his followers a "Merry Christmas," once again lamenting what he described as an "assault" on the phrase.
"I am proud to have led the charge against the assault of our cherished and beautiful phrase.
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