It’s easier than you think! First you must we well known and reasonably popular. Second you need a platform of solid rock. You can easily win if you run on a single issue, illegal immigration.
Simply take the hard line to seal the borders, locate and deport the illegal aliens with a priority on beginning with those with criminal records. Getting rid of even Green Card holding felons would be very popular and give our crime rate a break too.
Maintain this platform and you will win the largest landslide in history.