Maybe not quite the stretch you envision Big Mick, when people are frightened enough, a substantial number can even be made to believe that an an invasion of Iraq is a sane and reasonable way to protect themselves from terrorists.   

However, America doesn't have to invade Canada to control it economically or politically, we've got enough of our own citizens and politicians who are only too happy to let you have control or sell the whole damned country to you, little by little, piece by piece.

No invasion needed in the short term, as long as we don't turn left again and do something radically socialistic, as we did with universal medicare.