Well, in the automotive industry, which never fully off-shored, there are plenty of domestic suppliers in places like Alabama and Tennessee, where the factories have always been.
There were plenty of domestic electronics suppliers back in the 70s and 80s when Macs and IBM PCs and peripherals were mostly assembled domestically too. The final assembly went chasing slave labor overseas and surprise surprise the supply chain here withered away (or off-shored, too).
In aerospace where off-shoring is flat-out illegal in most cases (ITAR), the domestic supply network for both mechanical and electronics is quite robust.
Oh and I forgot to mention, places like Brazil have domestic production quotas for electronics too. Maybe they were helped along by the fact that until recently we had no such trade barriers in place. Or as a certain favorite politician opined, they were taking advantage of our trade policies to benefit their workforce.