I guess I'm not following. I'm not sure that tariffs are actually affecting the interest rates myself, and besides, you should be real happy with the rates compared to when your boy Obama left office. They were between a quarter and half percent then and are sitting at 1.75% now.
https://countryeconomy.com/key-rates/usa
A global trade war slows down the economies of all involved. In order to keep an economy from doing so, the Fed will manipulate interests rates by lowering them. This is exactly what is happening now. While many think lowering interest rates is a good thing, the people who were responsible with their money (i.e. savers) see less of a return. That's how it works, regards of Obama whataboutisms.