You'd do much better writing your elected reps asking them to oppose this at this time. It would be so much better to stop it before Congress voted on anything before it landed on the Presidents desk. Nothing wrong with contacting the President, but if you want to contact him, (or at least maybe someone) here is the contact information for the white house. https://www.usa.gov/federal-agencies/white-house
Trump has never paid much attention to the whitehouse petition thing that obama set up.
I appreciate your guys desire to oppose further restrictions.