Metal Wolf Chaos
Let’s be as succinct about this as possible: Metal Wolf Chaos is a video game, wherein the President of the United States straps on a mecha suit to overturn the military coup orchestrated by his former Vice-President (who sports an Evil Villain Beard that would make Al Gore envious).
Best quote (towards the end, as our tank-chucking President clings to the side of a launching spacecraft):
Nothing is pointless! And the reason is—because I am the President of the great UNITED STATES OF AMERICA! YEEEEAAAAAAAAAAAAHHHH!
Only in Japan.