so that America loses.
North Korea has degraded the US relationship with South Korea and by implication with the SE Asian alliance. Trump also withdrew from the Trans-Pacific Partnership. China is the beneficiary and the US will have less influence from now on.
Putin has degraded the US relationship with Europe through America's dismissal of the Iran deal. Trump also exited the Paris Accord, which once again damaged its relationships.
Trump has also harmed US relationships with America's near neighbours, Mexico in particular.
Basically, Trump seems hostile to everything that isn't his country, and - well - himself.
I guess the American people, via the funky presidential voting system, decided they wanted isolation from the world. And what they have is a corrupt egomaniac with a single aim: to use the political system for personal gain.
At least, that is where things are headed.