Secure the border FIRST. The rest is an unconscionable sop to lawbreakers.
1-Secure the Border and deport anyone one who crosses it. Build The Wall and have a more visible armed presence.
2-Eliminate all Santuary nonsense. An Illegal gets arrested and booked at the Police station, he is held and ICE is called.
3-Deport all illegal criminals- Fellons and misdeamors
4-Create everify system for employers and fine employers that hire illegals or do not check.
5-Create Visa tracking system and deport anyone who over stays
6-Lastly create legal status and path to Citizenship for the Dreamers and others if they kept their nose clean towards #3 above
He does this, he loses most of his support.