1) People in positions of authority are now openly anti-progress in an effort to pacify entrenched interests.
2) These same people are also openly anti-immigrant. In the past, a lot of science in the USA has been imported from other countries by way of immigration.
Less science equals less/inferior technology which equals smaller economy and weaker USA.
What has changed is primarily 2 things:
1) People in positions of authority are now openly anti-progress in an effort to pacify entrenched interests.
2) These same people are also openly anti-immigrant. In the past, a lot of science in the USA has been imported from other countries by way of immigration.
Less science equals less/inferior technology which equals smaller economy and weaker USA.