Does the US have EMP weapons of this power in their arsenal?
They can dial down the blast yield on a conventional nuke and have it detonate high in the atmosphere over the target. There were tests conducted on this back in the 50’s and 60’s, but they were mainly to study the effects such blasts (from a nuke exchange with the USSR) would have on the US.
We had carbon fibers that did a great job on Iranian power lines. They’re cheaper than a nuke.