Republicans, furious at Sen. Rand Paul (R-Kentucky), are accusing him of jeopardizing national security to further his presidential campaign.

Paul used Senate procedure to successfully — and temporarily — block the chamber's push to renew parts of the Patriot Act on Sunday.

This caused three sections of the controversial surveillance bill, including the National Security Agency's bulk records-collection program, to expire early Monday morning.

Needless to say, GOP senators who believe the NSA needs robust powers are not pleased. Politico documented many of their gripes.

"I know what this is about — I think it's very clear – this is, to some degree, a fundraising exercise," Sen. John McCain (R-Arizona) said. "He obviously has a higher priority for his fundraising and political ambitions than for the security of the nation."

Sen. Dean Heller (R-Nevada) further accused Paul of theatrics last month, when the Kentucky senator launched a 10-1/2-hour filibuster that stalled the NSA bill.

"He could only raise money filibustering," Heller was quoted as saying.

Even Majority Leader Mitch McConnell (R-Kentucky), who has endorsed Paul's presidential campaign, accused the bill's critics of waging a "campaign of demagoguery and disinformation," according to The New York Times.

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Though being so heavily criticized by fellow Republicans could easily be a blow to a GOP presidential candidate, Paul is waging an unconventional path to the nomination. The libertarian-oriented senator has repeatedly blasted the Patriot Act for what he refers to as its "illegal" spying operations, and he was unapologetic in the face of Sunday's attacks against him.

"Tonight we stopped the illegal NSA Bulk data collection," Paul said in a statement. "This is a victory no matter how you look at it. While some will use fear and intimidation tactics, I believe there is nothing that prevents our intelligence community from continuing to safely guard our nation, while also respecting our Constitution."

As his critics charged, Paul did use his campaign against the bill as a fundraising tool:

The expiration of the Patriot Act provisions may last only a few days as the Senate works through its procedures. But Paul's statement argued the delay still represented a win.

Paul said the victory "might be short-lived, but I hope that it provides a road for a robust debate, which will strengthen our intelligence community, while also respecting our Constitution."

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