Sometimes I see small eruptions of sentiments to hire only Americans (and legal residents of course). You'll see new sites like hireamericans.org arrive. While I certainly understand the emotional pull and the therapeutic value of these sites, in my opinion, they will have very, very limited success. There are a couple of limiting issues. First, this action is targeted at the very bottom of the food chain, meaning that it effects will be limited.

Seems Tech companies are in collusion to not hire employees away from each other as well as setting compensation package amounts between each other.

A Wall Street Journal Article, U.S. Steps Up Probe Of Hiring In Tech describes the scene.