The Presidential Limousine Cadillac: either you are exempt from testing

There are few people who can claim to have seen a U.S. presidential limousine during testing actually this is a more unique occurrence that rare as stress colleagues from LeftLane rightly proud of their scoop.
Photographers who have seen this rare pachiderma were amazed by the size of its giant wheels, which are approaching more to those of a truck than to those of a car. And the speech can also be made about the engine, which is a big diesel by the tone very similar to that of trucks. For the rest the body was created by assembling shares from various Cadillac models, as STS and Escalade. This will be the car that will move the winner of the upcoming presidential?