The decision represents the first time this year that the Senate has voted against expanding gun rights.
Today, the Senate rejected an amendment that would have allowed Americans with concealed weapons permits to carry their firearms across state lines. It was a rare rebuke to the gun-rights movement, which has exerted growing clout on Capitol Hill, and begins to define where Congress will draw the line on gun owners.
This is the fourth major gun issue the Senate has faced this year. Three previous amendments that expanded the rights of gun owners have all passed, including the most recent bill which allows loaded weapons in national parks.
But for a pivotal number of senators, today's amendment was too ambitious.
Opponents of the bill, introduced by Sen. John Thune (R) of South Dakota, argue that it would infringe on the rights of states and cities to set their own laws on gun control. "The Thune amendment would invite chaos in our cities," Sen. Kirsten Gillibrand (D) of New York told the New York Times.