Sure, and he'd carry out numerous other Christian theocratic policies. He transformed the Supreme Court, which likewise explains why White Evangelicals support him with such cultish zeal.
But that's a different question from the one I'm asking here. The transactional relationship between Trump the narcissist and his Christian cult is clear. Trump gives them their policies, and they give him their adulation and votes.
What I'm asking here, though, isn't why "Christians" follow him, but whether Trump and his followers are Christian in any sense.