To back up the parent post, let's say in a single day a sudden coup brings down the government of a development country the president is currently visiting. In i's place is an extremist government that's extremely hostile to the US made up of a lot of recently former terrorists who would love nothing more than hold the US president hostage (or worse). The president is nowhere near Air Force One, and The Beast has to drive 800 miles across hostile territory to reach a SEAL extraction team in a friendly country. The route has to go through very rural areas where Secret Service agents have to do things like hold up gas stations, spending only five minutes pumping before moving on. And where gas stations are sparse, forget even about electric fast-charging stations, the agents have to sneak up to parked cars and steal gas quickly with specialized pump-driven siphons, relying on the fact that gasoline can easily transferred from one car to another quickly. Far faster than any kind of scheme with jumper cables. In this nightmare scenario, you want something ridiculously ubiquitous and instantly replenishable.
An electric Beast would be an absolutely terrible idea. Stateside an electric Beast would actually be a neat PR bit to show the Oval Office cares about green technology. But the fact that electric car advocate geeks will take issue with the above scenario and will make endless excuses for their technology and will dismiss very legitimate practical concerns with electric says a lot about how detached from reality the electric car movement really is right now. Screaming "FUD" really doesn't make anything better.