How long will it take for Trump to realize that even the USA needs friends.  All the more so, if Trump is right that it is in decline.  Sadly, his policies are only likely to make things worse for ordinary Americans and the rest of the world.  America First played a huge role in turning the 1929 stock market crash into the Great Depression.  The only possible beneficiaries (near term, only) are a few of Trump's kleptocratic dictator and would-be dictator friends (but their countries will suffer).