Write up a job description that requires 10 years of experience in something that has only existed for 5 years (to use a brazen and obvious example), laden with "experience" requirements that eliminate the US labor pool from ever being "qualified" (that is, at the wage you want to pay, remember Americans also have student loan debt whereas a lot of immigrants' native countries fully fund their colleges and universities).

Call in a token American or two for an interview, deem them not qualified. Voila! "We can't find American workers, time to apply to bring over H1Bs, or contract out the work to someone who can."

If Trump wants to actually tighten up the requirements (and enforcement thereof) for what constitutes a bona fide search for qualified American workers, he could actually gain a lot of traction here (as could Bernie). I think we all know where Hillary stands.