I personally know someone really smart who was on an H1B visa in the US with his family. Recently, when hit with an RFE (request for evidence) during a routine renewal of his visa, he decided that it just wasn't worth the trouble of living in perpetual fear (settled status wait time is about 15 years) and shifted his entire family to Canada.

I bring this up because while Trump may attempt to target visa abusers, some smart people are also trapped in the crossfire which I feel affects the country negatively.