Senators, including some who once voted against an assault-weapon ban are jumping on the gun control band-wagon.
The "assault weapons" which were the target of yesterday's gun-ban advocates were not in fact assault weapons but ordinary semi-automatic sporting rifles that look like real assault weapons, the critical difference being the primary characteristic of any true assault weapon is fully automatic function. What today's (Las Vegas) shooter used is a true, fully automatic assault weapon.
While time and circumstances have caught up with and corrected a critically ignorant mistake the important point in this distinction is the true assault weapon has always been illegal. What yesterday's ignorant gun-ban advocates were calling for was a stupidly redundant effort to ban ordinary semi-automatic sporting rifles (e.g., AR-15, etc) -- which are not assault weapons.