An arrogant Barack Obama chided John McCain today and taunted him before a rally crowd saying, "John McCain doesn't know what he's up against." Somehow, I think McCain knows exactly what he is up against:

Obama, campaigning in a state where he hopes to become the first Democratic presidential candidate to win in more than three decades, implored his supporters to fight for the presidency.

"Our job in this election is not just 'win,' although I'm a big believer in winning," Obama said during the rally. "I don't intend to lose this election. John McCain doesn't know what he's up against."

"He can talk all he wants about Britney (Spears) and Paris (Hilton), but I don't have time for that mess," Obama said.

His remarks carried forward a theme of feisty campaigning he debuted earlier in the day.

Obama is wounded from his obvious loss to John McCain at the Rick Warren forum. He's trying to sound like the tough guy now. But John McCain has faced far more frightening people in his life than Barack Obama.

The truth is -- it may be Barack Obama who doesn't know what he's in for.