Only two candidates have discussed closing the H1B loopholes, I'd start posting your concerns on their social media sites, EN MASS!
Trump and Carson are the only two I've heard discuss closing the H1B loopholes. There are 2,000,000 American IT workers in the US, you'd think they and theirs would be all over this. 500,000 non US workers currently working in IT, or 20%, IT salaries are exactly where they were 13 years ago. If you want ANY chance at getting this fixed, the choice it obvious.