McCain says he's mathematically in

John McCain's camp is strengthening its case that he has the Republican nomination locked up, saying it is mathematically impossible for Mike Huckabee to reach the 1,191 delegates needed to clinch.

"Of course I'd like for him to withdraw today," McCain told reporters in Washington. "It'd be much easier."

But, he said, it's up to Huckabee to make that decision.

Huckabee said McCain would have "too much honor" to have the "audacity" to urge him to drop out. "It would be beneath is dignity," the former Arkansas governor said.

"We're both seeking the same job," he told reporters in Little Rock, Ark., before leaving for Wisconsin, which votes next Tuesday.

After McCain's sweep yesterday in the District of Columbia, Maryland, and Virginia, McCain has 821 delegates to Huckabee's 241, according to an Associated Press tally.

In a memo to reporters today, McCain's campaign says there are not enough delegates left to be awarded for Huckabee to make the magic number. McCain, on the other hand, needs to win only about 35 percent of the 774 pledged delegates left, his campaign says.

Huckabee, however, is vowing to stay in the race, hoping to keep McCain from getting to 1,191 delegates and somehow pull off a miracle at the GOP convention in September.