Gun control activists have launched a frenzied effort to revive legislation that failed in the Senate last month.

They see a glimmer of hope, pointing to the plummeting poll numbers of lawmakers who opposed the bill and the anger expressed at Sen. Kelly Ayotte’s (R-N.H.) recent town-hall meetings, where she was challenged on her “no” vote.

The Senate’s move to block a series of gun control measures — particularly a proposal expanding background checks — has been viewed as the dagger that destroyed any chance of enacting new firearms restrictions in the wake of December’s grade-school massacre in Newtown, Conn.