The Senate met in very contentious session on May 28th, which included more than 10 hours of floor time from Senator Rand Paul. Senator Paul threatened a filibuster, and spent those hours talking about why NSA spying needs to be reformed. Senate Majority Leader Mitch McConnell tried desperately to stave off the expiration of the expiring provisions of the Patriot act, but was unsuccessful. He called the Senate back for a Sunday session on May 31st. At that session, the Senate let three provisions of the Patriot Act expire: Section 215, the section the government uses to collect phone and other business records in bulk, the "Lone Wolf provision," and the "roving wiretap" provision. Ultimately, the Senate passed the USA Freedom Act. But for a few days, Section 215 of the Patriot Act expired.