They can, yes. But this is likely harder than you think. Suppose Trump puts a bunch of tariffs on cheap Chinese tires so that American tires are price competitive again (no idea if this happened, this is a hypothetical). If the next president removes those tariffs it would look like fucking over the tire manufacturers in whichever swing state they live in.
Ya I just have a suspicion that for some industries maybe easily done but for others, four years isn't long enough to embed yourself in an economy to the point where you have political support. It's not a bad idea to onshore some manufacturing. Like targeting the semiconductor and medicine industries should be a higher priority than autos I think. But what could happen is the companies put on a show of onshoring but nothing is really done because they know four years isn't long enough. For those two industries I suspect it's not.
