I don't understand how all the authoritarian things he does keeps flying, isn't there any regulations in place to keep a crooked president in check? So much for

I don't understand how all the authoritarian things he does keeps flying, isn't there any regulations in place to keep a crooked president in check? So much for "worlds greatest democracy". I prefer coalition governments which trade efficiency against "ultimate power". Why doesn't Apple, Microsoft, Amazon, Walmart, McDonald's and friends come together and tell him to go fuck himself?