We’re all sinners.
True.
I don’t think Joe, Don, or Kamala are legit Christians beyond what they act like for political reasons.Fortunately, though, far fewer of us are wholly unprincipled (per his sister), racist (per his niece and nephew), rapists (per a judge), con men, thieves and rip-off artists (e.g. Trump University, the Trump Foundation and the Trump Organization) and felons.
I doubt Trump believes in God. In his mind, how could anyone or anything possibly be greater than he?
I take exception to the idea that x isn’t really a Christian if he or she votes for y.