He'll use Alien tech to infiltrate our brain waves to make us immortal beings…but only Trump supporters as there are only enough batches to offer it to them first. So for the next thousand years, until a new batch is manufactured on TeslaMars by Bill Gates drones, we'll be slave owners of Democrats and live in peace and harmony with China that we'll have nuked to ashes and resettled with reanimated Dinosaurs as a hunting park for the rich and inebriated.
But he's only human so he won't be able to do too much besides that.