The Canadian Dollar is presently stronger than the U.S. Dollar. Why is U.S. economy in such state of chaos?

The size of Canada's economy is about 10% of the american. However the Canadian Dollar is stronger than the American. This state of affairs represents the chaotic situation of our economy which, under Bush administration, came to have a debt of 9 trillion dollars to the entire planet, including communist China (we own them 400 billion dollars). Is there still salvation or we are condemened to be the next country to go down the tube?