Are US Treasury bonds still "low risk" in the current administration or what should I look for when buying bonds?

My question is the title. I don't understand bonds too well, but would like to by some. I have bought US Treasury in the past and am satisfied in the results, but I'm not sure if any of Trump's shenanigans could mess with the returns. If US Treasury is not to be trusted right now, how do I get into other bonds? what should I be looking for?

Additional context behind this strategy decision: I have about $500 excess a month that I'd rather invest than let sit pretty in my savings, since my emergency fund is big enough. I'd keep putting it in the markets like I have been for the past few years and let it do its thing, but I may or may not have to pull out some money in 3 to 5 years. (potential cross country move and expensive surgery for my chronic pain). Hence, my risk tolerance moving forward is very low and my plan needs to be shorter term since I may not have "10 years to let the market recover" and I keep seeing be thrown around in this sub.

Any advice on my strategy is appreciated! and please educate me on bonds.