When President Obama took office, gun rights advocates sounded the alarm, warning that he intended to strip them of their arms and ammunition.

And yet the opposite is happening. Mr. Obama has been largely silent on the issue while states are engaged in a new and largely successful push for expanded gun rights, even passing measures that have been rejected in the past.

In Virginia, the General Assembly approved a bill last week that allows people to carry concealed weapons in bars and restaurants that serve alcohol, and the House of Delegates voted to repeal a 17-year-old ban on buying more than one handgun a month. The actions came less than three years after the shootings at Virginia Tech that claimed 33 lives and prompted a major national push for increased gun control.

Arizona and Wyoming lawmakers are considering nearly a half dozen pro-gun measures, including one that would allow residents to carry concealed weapons without a permit. And lawmakers in Montana and Tennessee passed measures last year — the first of their kind — to exempt their states from federal regulation of firearms and ammunition that are made, sold and used in state. Similar bills have been proposed in at least three other states.