Do you (1) WANT to go on this hypothetic future trip to the USA but you're afraid of being turned away on arrival, being detained for longer than is reasonable and/or in harsh conditions, or you or your husband being shot or otherwise intentionally injured or killed? Or (2) DEFINITELY NOT want to go to the USA this year, but feel bad about disappointing your husband who expected to go and still wants to go?
If it's 1, I'd be clear about both the real risks/downsides and your own fears (what is DIFFERENT this year?) so that you can evaluate whether they're sufficient to say you shouldn't go (what's the point of a holiday where you're worried/on edge all the time?) AND explain clearly to your husband if you decide it's a no. My sense (I'm in the USA) is that most of the things you might be worried about specifically now are statistically unlikely to impact you (and some you can eliminate altogether) but the real or perceived risk MAY still be too great for you, and that's OK. There's also the question of whether it's ethical to go; that's a personal decision but if it's important to you it's fine to act on it - believe me, there are many US citizens living in the USA who are actively trying to reduce overall participation in the US economy and/or minimise financial support of the federal government and its projects.
If it's 2 (or if it's 1 and you ultimately decide you can't go) I'd try to qualify/quantify what you both loved about your previous USA trips (keep in mind, there have been other changes since the start of COVID which are independent of and preceded the current administration) and brainstorm other possible trips.
If, say, it's the combo of diverse wild/adventurous places + local culture + big diverse cities + ease of getting around then you might try to replicate parts of the experience with someplace like Canada, Australia, New Zealand (more "familiar" feeling) but Chile and/or Argentina/Uruguay could also be a good bet, or Japan, or South Africa. (Obv some of these don't work if you want a really summery trip and need to go in northern hemisphere summer, but would still be very workable in their own right - and maybe nicer and more relaxed due to be less crowded and less expensive than high season). If the "big trip"/medium-to-long haul aspect isn't important, maybe Spain/Portugal, France, Norway (and beyond, if you want), or the Adriatic coast or Baltic coast (and nearby cities, if you want an urban element)?
If the USA is out for this year, find another place to focus on so you're planning a great, new, exciting trio, rather than trying to justify saying no to a trip that probably wouldn't be exactly what your husband (and you) hope for and remember.