By what metric is the US lagging? By any objective measure we can see the dominance of US technology. I think it’s most of the rest of the world that’s being left behind; Europe in particular. If what you’re saying is true the US economy would also be flagging but it’s not. If what you’re saying is true, you’d see the list of the world’s most valuable companies dominated by non-US firms.

I think you are confusing the current climate of immigration enforcement and reform with being anti-immigration. The US will continue to draw top talent because the US is where the bulk of the opportunities are and will be for at least the next 5 years.

It’s been widely discussed that the immigration system has been abused, especially by the tech industry. This reform started under Obama. The current outcry is a reaction to the most recent federal election. Reform does not mean the US is anti-immigrant. It may mean lower levels of immigration that’s more selective for talent.