The FISA Amendments Act, (.pdf) which was expiring Friday at midnight, allows the government to electronically eavesdrop on Americans’ phone calls and e-mails without a probable-cause warrant so long as one of the parties to the communication is believed outside the United States. The communications may be intercepted “to acquire foreign intelligence information.”

The House approved the measure in September. President Barack Obama, who said the spy powers were a national security priority, is expected to quickly sign the package before the law Congress codified in 2008 expires in the coming hours. Over the past two days, the Senate debated and voted down a handful of amendments in what was seen as largely political theater to get Sen. Ron Wyden (D-Oregon) to lift a procedural hold on the FISA Amendments Act legislation that barred lawmakers from voting on the package.

In the end, the identical package the House passed 301-118 swept through the Senate on a 73-23 vote.