Big wins for gun control - but can we maintain the momentum?

Lost in all the coverage surrounding the Democrats winning control of the House and the daily chaos wrought by President Trump before and after the election were some big wins for gun control.

Across the country, a number of candidates campaigned in favor of stricter gun measures -- and won. For too long, candidates have treated gun control as a third rail of politics for fear of riling up the apparatchiks at the bloody National Rifle Association. But many voters, corporations, and recent candidates are fed up with the NRA's recalcitrance.

Maybe the 49 shooting deaths at a nightclub in Orlando in 2016 caused some to rethink the meaning of the Second Amendment. Or maybe it was the 58 people shot dead at a country music festival in Las Vegas in 2017. Or the 17 who were shot and killed at Marjory Stoneman Douglas High School in Parkland, Fla., in February.

Or maybe it was the fact that there have been nearly as many mass shootings in the U.S. this year as there have been days.