Sen. Pat Toomey says he wants to break a current stalemate in the Senate.
Toomey's comments come as he's under pressure to back a Democratic proposal.
Sen. Chris Murphy says he intends to hold the Senate floor.
Katie McGinty is trying to unseat Sen. Pat Toomey (R-Pa.).
The Democratic leader said Sanders shared "moving" tales from the campaign trail.
House Republicans briefed their Senate colleagues on the measure.
Jeff Sessions said voters understood that "that's just his way of expressing [himself]."
Julian Hattem 06/14/16 12:30 PM EDT
Grassley needs a "more thorough understanding" of Omar Mateen, he told the administration.
Senators had a last-minute fight over amendments.