Katie Couric's Notebook: Troop Increase

It's a decision that some say could ultimately define his presidency.

President Obama announced that he'll send an additional 30-thousand troops into Afghanistan, with a preliminary drawdown of forces expected to begin in the summer of 2011.

While the strategy has elements of compromise in it, the White House is taking heat from both sides…the liberal democrats who want U.S. troops out, and the hawks who say projecting an exit date only emboldens the enemy.

And then, there's the matter of cost...as much as 30-billion dollars more and no clear way to pay the bill.

Congressman Dave Obey and Senator Carl Levin have each proposed a war tax...calling for shared sacrifice from the American people during this difficult time.

But tax or no tax, the administration now has the unenviable task of selling this new strategy to those same American people...and coming up for a palatable plan to pay for it, perhaps the biggest test yet of his power of persuasion.

That's a page from my notebook.

I'm Katie Couric, CBS News.