Obama 180 on ethnic cleansing??

Moderator Tom Brokaw asked the candidates what their "doctrine" would be "in situations where there's a humanitarian crisis, but it does not affect our national security," such as "the Congo, where 4.5 million people have died since 1998," or Rwanda or Somalia.

In such cases, answered Obama, "we have moral issues at stake." Of course the United States must act to stop genocide, he said. "When genocide is happening, when ethnic cleansing is happening . . . and we stand idly by, that diminishes us."

But that wasn't how Obama sounded last year, when he was competing for the Democratic nomination and was unbending in his demand for an American retreat from Iraq. Back then, he dismissed fears that a US withdrawal would unleash a massive Iraqi bloodbath. "Democratic presidential hopeful Barack Obama said Thursday the United States cannot use its military to solve humanitarian problems and that preventing a potential genocide in Iraq isn't a good enough reason to keep US forces there," the AP reported on July 20, 2007 (my italics).

What kind of candidate is it whose moral response to genocide - genocide - can reverse itself 180 degrees in a matter of months? Is that the kind of candidate who ought to be the leader of the free world?