The Senate actually took the step of advancing painstakingly crafted bipartisan reform legislation yesterday that would end the controversial National Security Agency program which scoops up telephone data on millions of Americans with no connection to terrorism.
But lawmakers failed to seal the deal on the USA Freedom Act, which would also preserve important national security provisions, or pass a short-term extension of those provisions first codified in the USA Patriot Act in the aftermath of the 9/11 attacks of 2001.
Paul, a 2016 presidential candidate, singlehandedly blocked expedited votes on the measure, as well as any potential extensions of Patriot Act authorisations.
The reform bill appeared likely to pass later this week, however, according to senators and aides, marking a historic end to the telephone data dragnet first exposed by Edward Snowden in 2013.
More From This Section
But the delay means the bulk data program and two other provisions, allowing roving wiretaps on terror suspects and lone-wolf tracking, will lapse at the end of yesterday.
The Freedom Act has already passed the House, but with the Senate yet to act on protecting or reforming critical counterterror elements, Senate Majority Leader Mitch McConnell called for a rare yesterday session to thrash out a solution.
But Paul, who wants the entire bulk data provision scrapped and does not support the reform bill, stood in the way.
"We call on the Senate to ensure this irresponsible lapse in authorities is as short-lived as possible," White House press secretary Joshua Earnest said in a statement.
The lapse raises what some lawmakers said were alarming questions about how US authorities can keep the homeland safe with a diminished security toolbox.
"I think it's very, very unfortunate that we're in this position," said Senator Mike Lee, a conservative Republican who supports the reform bill.