the bipartisan background checks act of 2019. it is time. >> this is a bad gun control bill, we ought to reject it. >> reporter: congresswoman lucy mcbath's son was killed in 2009. it's the reason she's in congress today. >> i ran on a platform of gun violence prevention, when people kept telling me don't do it, that's suicide, you can't win. the numbers aren't there. i wasn't the only one that ran on this platform. but this was my number one platform because it's the right thing to do. >> reporter: mcbath, a democrat notched an upset victory in november after six years of gun advocacy, in a campaign that didn't shy away from the issue. >> and in the end, i will always just be a mother on a mission. >> reporter: steven scalise, moments from death in 2017, after he and republican colleagues were targeted by a gunman at a congressional baseball practice. now both at the center of the