After former President Donald Trump gave his victory speech early Wednesday, at the Palm Beach Convention Center, dozens of his supporters gathered in a lobby to sing “How Great Thou Art,” reciting from memory the words and harmonies of a classic hymn, popular among evangelical Christians. It was a fitting coda to an election in which Trump once again won the support of about 8 in 10 white evangelical Christian voters, according to AP VoteCast, a sweeping survey of more than 120,000 voters.