Unlikely that drones will be exempt.
Phones are exempt because Apple "convinced" Trump that the consumer base won't pay triple for iDevices. They had to allow Android phones because of monopoly laws.
Electronic components are exempt because...
Call me crazy but the $1150 that I paid for my Mini Pro 4 was my absolute limit on price for something that can malfunction and disappear.
But I'm a cheap bastard. I didn't even pay that much for the car I've been driving for the last 6 years.