As a whole, Scientologists tend towards the Republicans and their “small government leaving decent folks alone” mythology, figuring that’ll be less regulation on their dodgy scams, quack cures, and ponzi schemes.
However, the Church of Scientology has strategies to work both the Republicans and Democrats. Their biggest gains were under Bill Clinton, who let them use the State Department as a club to beat on allied nations and friendly neutrals. They even forced Sweden to make an express change to their constitution to make Scientology happy. (Imagine what that would take in America.)
But yeah, they like Trump. There was even a tiny pro-Trump blip in the voting near their LA headquarters.