A short-term expiration would not have interrupted ongoing operations but would have barred the government from seeking warrants for new investigations.
Congress bumped up against the deadline mainly because of the stubborn resistance from a single senator, Republican freshman Rand Paul of Kentucky, who saw the terrorist-hunting powers as an abuse of privacy rights. Paul held up the final vote for several days while he demanded a chance to change the bill to diminish the government's ability to monitor individual actions. The bill passed the Senate 72-23.
The measure adds four years to the legal life of roving wiretaps — those authorized for a person rather than a communications line or device — of court-ordered searches of business records and of surveillance of non-American "lone wolf" suspects without confirmed ties to terrorist groups.
The roving wiretaps and access to business records are small parts of the USA Patriot Act enacted after the Sept. 11, 2001, attacks. But unlike most of the act, which is permanent law, those provisions must be renewed periodically because of concerns that they could be used to violate privacy rights. The same applies to the "lone wolf" provision, which was part of a 2004 intelligence law.