Chris Murphy

WASHINGTON — A Democratic senator who mourned the loss of 20 children in his home state of Connecticut four years ago waged a nearly 15-hour filibuster into the early hours of this morning, demanding votes on gun control measures just days after a mass shooting at a Florida nightclub.

As compromise on the gun issue remained improbable, Sen. Chris Murphy stood on the Senate floor for most of Wednesday and into today, saying he would remain there “until we get some signal, some sign that we can come together.” He yielded the floor at 2:11 a.m., saying he had won commitments from Republican leaders that they would hold votes on amendments to expand background checks and ban gun sales to suspected terrorists. It is unlikely that those amendments will pass.

Murphy spent much of the time speaking about the shooting at Newtown.