Don't worry, Republicans are hard at work making the USA a pariah state and turning away the educated migrants who've been behind most of the innovation and research of past decades.

Immigration is a double edge sword. Sure, it brings highly educated people on the top end, but also less educated at the bottom curve.

and on balance it changes demographics dramatically, that also shapes US policy in the future. It will be harder for USA to continue to be bloody warmongering machine with Military industrial complex dictating the policy and bombing countries and blowing up civilians around the world.

That's not necessarily a good thing. Do the New Americans want the same things as the pre-existing ones? Are they as capable? Not just "in a few generations" but here and now? Are they even likely to be as capable "in a few generations"?

If the statistics aren't very wrong, it doesn't seem like a solution.

Immigration isn’t risk free

You get your birth rates up, but you also risk alienating your native born population and electing far right morons into office

Jury’s out on whether a tfr of 1.0 of native born people is better than a tfr of 1.4 with immigrants

Immigration will take a nosedive under Trump.