Emergency medicine fun fact of the day: We typically only use helicopters for transport if things are *really* bad. We're talking "we can't get the to the hospital fast enough by ambulance and they need to be at the hospital ASAP or they'll die" bad. You know, like a car crash victim in need of a level I trauma center 30 miles away. It usually has to be really bad for a helicopter to get used.
uspol, medicine and the presidency
Though, in seriousness, this is probably one of those times when the "typically" kicks in. Given that he's president, Trump condition wouldn't *necessarily* need to be critical for helicopter to be the preferred mode of transport. It could be protocol to transport a president by air. Or Trump might've just wanted to ride in the helicopter. That said, this isn't to say that his condition *isn't* critical either. Until we get more details, we really don't know.