Jim Geraghty of National Review and Greg Corombos of Radio America welcome research from a liberal expert showing that no policy pushed by gun control advocates would likely stop previous or future mass shootings and that focusing on people instead of weapons is likely a better approach.  They also slam Republican Pennsylvania Rep. Tim Murphy for posing as pro-life while encouraging his supposedly pregnant mistress to get an abortion and urge him to leave office as soon as possible.  And they react to Mike Pence's chief of staff suggesting it was time for a purge of Republicans who aren't sufficiently loyal to Pence and President Trump.