Six Democrats from gun-friendly states join Republicans to support an amendment sponsored by Sen. Mike Lee that would establish a two-thirds requirement for the passage of any gun control legislation in the Senate.

Reports Roll Call:

A little-noticed Senate vote just before 4 in the morning on March 23 — amid the chamber’s 13-hour vote-a-rama on a fiscal 2014 budget resolution — suggests trouble for President Barack Obama’s gun control agenda.

Senators voted 50-49 in favor of an amendment by Sen. Mike Lee, R-Utah, to establish a two-thirds requirement for the passage of any gun control legislation in their chamber. While the budget resolution is nonbinding and the amendment did not win the 60 votes needed to be adopted, the outcome underscores how many senators strongly support gun rights, just as the chamber prepares to debate the biggest package of gun control measures in nearly two decades.