On a related topic, my girlfriend is from Venezuela and is not yet a U.S. citizen but is allowed to take the test for X-Ray technician because of a shortage in that field. It is MUCH MORE complicated than the driver's license test. She has 11 years of experience as an X-Ray tech (Radiographer) in Venezuela but still has to take the test here. Because of limited English skills she failed to pass the Florida test twice but she is studying very hard and hopes to pass again in May. Third time is a charm. BTW, I've looked at some sample test questions and they are so technical even I have trouble understanding the English in it.
p.s. No Jeb Bushes were harmed in the making of this post.