Gregory, there are significant historical ties between the United States and Nazi Germany, including a significant presence of Nazi and neo-Nazi party and sympathizers in the United States of America since the 1930s through to today.
There is not, however, any ongoing tradition of either Tibetan Buddhist or Hindu symbols in the United States.
The Hindu symbol faces the same way as Nazi, but lay square and has the dots.
The Buddhist symbol has no dots but faces the opposite way.
Thinking critically, there is a vanishingly improbably chance that the symbol had anything whatsoever to do with Buddhism or Hinduism, being a US politician’s office, which typically only features symbols which are within the “family of” American symbology, which sadly also includes Nazi swastikas as well as crosses and jewish stars and a rare crescent, but you’ll statistically almost never find a Buddhist or Tibetan symbol.
Ever.
You can bring it up “for fun”, as a deflection or academic point, but it’s a rabbit trail leading nowhere. The highest probability is that it was a Nazi symbol and the standard internet deflection does not hold much water, a thimbleful at best.