A drugged-up Elvis decides to head to the White House, meet Nixon, and get a Federal Drug Agent's badge. It's a great piece of comedy, made even more bizarre by the fact that it's a true story!
There's something tragi-comic about Elvis's behavior: the way he doesn't see a problem carrying his guns onto planes, and thinks it's reasonable to ask the pilot to divert a commercial flight for his personal convenience. It's obvious that his personal life is a total disaster, yet somehow, he gets away with it - a true larger than life character.
This would definitely make a fun film, something like a cross between Catch Me If You Can and The Men Who Stare At Goats. However, it's already been done (Elvis Meets Nixon, 1997) - I haven't seen that version, but I'll certainly look for it.
(reviewed the day of purchase)