Every one talks about the wall... America is in a 20 trillion dollar debt while the rest of the world gets richer > with the help of the americans. He now wants to turn the ties and gain a bit more profit to help America out of debt. The Mexican wall is to prevent illegal immigrants. Read: Illegal. He didn't say he wants all immigrants of of the country. If you want to work/live in America, you will have to do certain trails, instead of coming in illegal. Illegal people costs the Americans a fortune, for what?