Only Trump (maybe Cruz) is credible on (illegal) immigration. He has made that the center piece of his campaign. Without a president Trump, US conservatism, (and US conservatives) will be on the ash heap of history. Let the left legalize 30-60 million "new" Marxist voters and it all over folks. The battle is joined and only Trump can win it for us. D's know this also so Trump will get a lot of democratic support too.
The only issue that matters this election is immigration and Trump owns that issue. Nothing else matters.