The rest of the World trusted the US (to whatever degree) before, why would it need to take decades since nobody before or after Trump is similar/same? Refusing to trust anyone from US government because of one person isn't rational. OTOH, I don't trust anyone in Washington DC, especially Congress- they have known the American public/voter approval rating has been 20% or below for a helluva long time, but they don't give a rat's ass and refuse to change. Well, they refuse to improve- they change, but for the worse.
A lot of us want term limits and no hands-on investing, but expecting them to police themselves is naiive at best, stupid, at worst.