By Corky Siemaszko and Perry Bacon
Thank you, @POTUS, for taking a crucial step forward on gun violence. Our next president has to build on that progress—not rip it away. -H
— Hillary Clinton (@HillaryClinton) January 5, 2016Obama: 'We are here to prevent the next mass shooting'
Obama on Tuesday flexed his muscle via executive powers in an effort to slow the flood of firearms sales.