The amendment would have let a gun owner carrying a valid permit from a state that allows concealed weapons to take guns into other states that allow concealed weapons, without a separate permit, as long as local gun control restrictions were obeyed.
After the vote, Mr. Thune signaled his disappointment. "Today, overheated rhetoric and fear mongering overcame common sense," he said in a statement. "My amendment would allow responsible firearms owners to protect themselves while obeying the firearms laws of the states they visit. The individual right to self-defense should not end at the state line."