Three key provisions of the act sunset on June 1. The Senate has scheduled a rare Sunday session to try to pass a House measure that modifies some of the provisions.
The Senate worked late into the night but failed to agree on extending government surveillance programs under the USA Patriot Act before adjourning for the Memorial Day holiday.
Tea Party Republicans are trying to make a comeback and have found one candidate to get behind for the Senate in 2016 — Florida's Ron DeSantis, a former JAG Corps lawyer and Yale baseball captain.
The freshman senator from Arkansas, who wrote the letter to Iran and rallied 46 other Republicans to object to a nuclear deal, revealed his guilty pleasure: eating birthday cake nearly every day.
Majority Leader Mitch McConnell promised to restore "regular order" to the Senate, making it more bipartisan and productive. Five weeks into the new session, the dream remains elusive.
Lawmakers in the Senate approved an extension of tax breaks and confirmed 12 more judicial nominees, but a terrorism insurance bill didn't survive the night.
Earlier, GOP Sens. Mitch McConnell and Saxby Chambliss said the release of the Senate's report on the CIA's interrogation practices "will present serious consequences for U.S. national security."
The Senate's report says CIA interrogators used methods such as rectal infusion and waterboarding on detainees. The report says the techniques were ineffective, a point the agency disputes.