One way to predict the likelihood that Senate Majority Leader Mitch McConnell will achieve the simple majority or supermajority needed for "clean" reauthorization of Section 702 is by looking at the voting history of serving senators.
FISA: 702 Collection
In 2008, Congress passed a set of updates to the Foreign Intelligence Surveillance Act (FISA), including Section 702 which authorized warrantless surveillance of non-U.S. persons reasonably believed to be outside the country. However, documents leaked by Edward Snowden revealed that 702 was being used far more heavily than many expected, serving as the legal basis for the collection of large quantities of telephone and Internet traffic passing through the United States (and unlike 215, including content rather than just metadata). Still, as 702 only permits overseas collection, most criticism of the provision has come from abroad. But many domestic privacy advocates also worry that large amounts of American communication are being swept up “incidentally” and then used as well.