That's a pretty bold claim, especially insofar as it (perhaps unintentionally) sounds like you're claiming both parties have weakened the US to the same degree.
It wouldn't surprise me if you listed out some ways in which Democrat incompetence has hurt US soft power, since screwing up is kinda their thing. However, given what Trump has done in his two terms so far, it's a tough sell that the two parties are playing the same sport, let alone fall into the same league in terms of damage wrought. It sounds like a strong application of Murc's Law absent your actual list.
My insider's view is that the Republican party will burn my house down, while the Democrats will form a committee that concludes they cannot send a fire truck to put it out and they absolutely cannot hold the responsible Republican members accountable unless they can get bipartisan support. Both need to go, but I have no illusions that one isn't better than the other.
1. https://www.urbandictionary.com/define.php?term=murc%27s+law