From New York Times, "Red Flag' Gun Control Bills Pick Up Momentum With G.O.P. in Congress":

Congressional Republicans, under pressure to respond to this weekend's massacres, appear to be coalescing around legislation to help law enforcement to take guns from those who pose an imminent danger -- a measure that, if signed into law, would be the most significant gun safety legislation enacted in 20 years.

"Red flag" laws such as this might not be as momentous -- or controversial -- as the now-expired assault weapons ban or the instant background check system, both of which were enacted in 1994 as part of President Bill Clinton's sprawling crime bill. But they may be politically feasible.