US Democratic senators are conducting a filibuster in an attempt to force a vote on gun control legislation following the shooting at an Orlando nightclub that left 49 people dead.
Senator Chris Murphy vowed to stay on the Senate floor "until we get some signal... that we can come together".
Meanwhile, the first wakes have been held for victims of the shooting.
Mourners gathered to remember those killed when gunman Omar Mateen burst into the Pulse gay nightclub on Sunday.
It was the worst mass shooting in modern US history. Dozens of people remain in hospital, some in a critical condition.