director of national intelligence, heads of nsa and cia are supportive of an extension of those capabilities and authorities. and unfortunately, i think that there's been a little too much political grandstanding, and crusading for ideological causes that have really skewed the debate on this issue. but these tools are important to american lives. >> we have reports from nbc news capitol hill reporter frank thorpe and nbc news white house correspondent kristin welker. welcome to you both. frank, the battle lines are staggered across the party lines with mostly bipartisan support. for an extension of some kind. what's likely to happen when the senate gets underway three hours from now? >> like you said at 4:00, they'll gavel in. this will be the first sunday session that the senate has had since 2013. and they're hoping to start having votes on some kind of bill to either reauthorize or reform provisions, these nsa provisions, these bulk -- bulk collection of data telephone data which will be actually the first votes that they've held in the senate sense 2012.