U.S. President George Bush called on Congress Monday night to broaden protection for telecommunications carriers that helped the government monitor phone calls and e-mail.

The Protect America Act, which allows the U.S. National Security Agency (NSA) to intercept phone calls and e-mails of suspected terrorists without first obtaining a court warrant, is due to expire Friday, and Bush called for its extension as part of his final State of the Union address.

"To protect America, we need to know who the terrorists are talking to, what they are saying, and what they are planning," he said in the televised address. "Last year, Congress passed legislation to help us do that. Unfortunately, Congress set the legislation to expire on Feb.1. This means that if you do not act by Friday, our ability to track terrorist threats would be weakened, and our citizens will be in greater danger. Congress must ensure the flow of vital intelligence is not disrupted."

Failure to extend the legislation won't just hit the NSA. The telecommunications carriers that worked with the agency despite the lack of court warrants also face privacy lawsuits, and an extension to the legislation would provide them legal protection. Bush touched on that point as well.

"Congress must pass liability protection for companies believed to have assisted in the efforts to defend America. We've had ample time for debate. The time to act is now," said Bush to applause from mostly Republican members of the audience. Vice President Dick Cheney, seated behind Bush, also applauded the call.

Cheney and the White House last week pushed Congress to extend the act and provide protection for telecom carriers. AT&T and other carriers are facing lawsuits in San Francisco by civil liberties groups and individuals who allege that the surveillance program is illegal.

Earlier Monday, efforts by Republicans to curtail debate in the U.S. Senate and force a vote on an extension to the act failed, and debate is due to resume Tuesday.