Of course if the  Catholic Church's norms for other things (like abortion or contraception) apply to non-Catholics, logically the rules about marriage and divorce would apply as well. 

Jesus was talking about all marriages when He said if you marry when divorced you are comitting adultery. Maybe Jewish ones, specifically, since that was who He was talking to. 

Many argue that if Jesus said something, it is universal. Makes no difference whether  "Trump is not a member of any church, sect, or denomination which has a problem with divorce and remarriage."
The argument should be whether Jesus has a problem with it.

Same with treatment of foreigners and immigrants. May not be against Trump's 'Religion', but question is whether it is against the religion of Jesus -- and ours.