No. America was doing just fine before him, and will be fine when he goes away. The American people, as a whole, are their own self-fulfilling prophecy. Except for PG&E dropping the ball on brush maintenance, shit-lickers who whine about their ocean-views being blocked if offshore wind-farms go up, and the general malaise against fossil-fuels.
(By the way, fossil-fuels are what are used to create the make-up that the envirofags put on to look pretty to be able to attend the "save-the-planet" meetings by driving there in their gas-guzzling SUVs, because they are too lazy to get a smaller car and maybe have to take two trips to the Costco to buy 10 gallons of milk which will spoil before they use it all anyway, which adds to the plastic gyre in all the oceans.)
Sorry, that was a ramble.
America was not fine... yeah the easy money pushed up the markets, but we been leaking jobs and IPs to overseas especially China too fast... unemployment was going down, but so was labor participation rate.. Have you though about the possibility that the trade war was necessary? and we are winning, deals have been done and the biggest one with China is coming... yes America will be fine after Trump, because he is/has saved it from the brink of losing world domination.