It never was $2 trillion, and never will be. Even so...

If the U.S. spent exactly as much as Canada does on every citizen, universal health care would cost about $4,700 per citizen (2008 estimated numbers). 300 million people would make that about $1.4 trillion. To be fair, we can subtract the about $587 we spent on Medicare and Medicaid in 2008 (I assume they'd be folded into the UHC), and we get $823 billion. Again, assuming our cost per person is as low as Canada's.

Assuming we never spent that money, and that we can ignore where the money actually went in our economy, $2 trillion would be gone in 2 years and 5 months. What do you do for the next hundred years?

Now, if you look at real war cost numbers, the $100 billion spent in Iraq every year would cover our imaginary super-Canada health care system for about 26 days.

The "we can't afford health care because of the war" meme died like a banana slug dropped on the Bonneville Salt Flats a long time ago. Stop wearing the corpse around your neck, already.