It's not a problem with patents. They can be licensed or even invalidated based on prior art.
US companies know how to make drones. Amazon makes its drones for its Prime Delivery service. We just can't make them at a competitive price level.
The man who lives in that big white house on the hill nearby believes that tariffs are that magic wand. But that wand is looking more and more like nothing but a broken stick.
Well, Pete, if it's so easy to quickly create a domestic American drone industry and supply the entire US market, why not do the same thing for all consumer electronics, major appliances, automobiles, shoes, red baseball caps, and clothing, too?