A short-sighted self-destructive policy that will ease us into mediocrity and a less robust military position.
I'm not so sure this is a bad idea during war time, in a protracted conflict, especially with the Red Chinese, who are not our friends, now or historically, nor into the future. How much highly sensitive information has been transferred to their homelands, or our enemies or both? The U.S. needs to revisit all it's programs and immigration programs, top to bottom, but while it's figuring it out, it needs to freeze the current programs, kick out those who aren't in compliance and seal the borders, once and for all. This should've been resolved ten plus years ago..oh, I forgot, Boy Clinton was selling our secrets to the Chinese for campaign contributions. Never mind.
There are thousands of unemployed engineers in the US right now, including folks with PhDs who have been laid off from corporate research labs. There is absolutley no need to import research talent right now.