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Republicans keep going on talk shows and insisting there's a possible convention floor fight for the Republican presidential nomination, but Romney's delegate totals continue to move up. In Puerto Rico, he did very well:

SAN JUAN, Puerto Rico (AP) – Mitt Romney scored an overwhelming win Sunday in Puerto Rico's Republican presidential primary, trouncing chief rival Rick Santorum on the Caribbean island even as the two rivals looked ahead to more competitive contests this week in Illinois and Louisiana.

The victory in the U.S. territory was so convincing that Romney, the GOP front-runner, won all 20 delegates to the national convention at stake because he prevailed with more than 50 percent of the vote. That padded his comfortable lead over Santorum in the race to amass the 1,144 delegates needed to clinch the nomination.

Nevertheless, the GOP nomination fight is unlikely to end anytime soon, with Santorum refusing to step aside even though Romney is pulling further ahead in the delegate hunt.

As the day began, Santorum claimed he was in contest for the long haul because Romney is a weak front-runner.

"This is a primary process where somebody had a huge advantage, huge money advantage, huge advantage of establishment support and he hasn't been able to close the deal and even come close to closing the deal," Santorum said. "That tells you that there's a real flaw there."

Not that I wouldn't love to see the Republicans splinter themselves in Tampa, but Romney is going to have to crash and burn before that happens. So far, it hasn't.