Amidst renewed calls for action against gun violence, top Senate Democrat Chuck Schumer is slamming his Republican colleagues for blocking gun safety legislation. MSNBC’s Ari Melber explains how this pattern is not new and interviews former DNC chair and Vermont governor Howard Dean and former Sandy Hook library clerk Mary Ann Jacob about what needs to get done to protect Americans from gun violence. Dean asserts, “This is hunting human beings. And these weapons are completely unnecessary.”  » Subscribe to MSNBC: http://on.msnbc.com/SubscribeTomsnbc About: MSNBC is the premier destination for in-depth analysis of daily headlines, insightful political commentary and informed perspectives. Reaching more than 95 million households worldwide, MSNBC offers a full schedule of live news coverage, political opinions and award-winning documentary programming -- 24 hours a day, 7 days a week. Connect with MSNBC Online Visit msnbc.com: http://on.msnbc.com/Readmsnbc Subscribe to MSNBC Newsletter: MSNBC.com/NewslettersYouTube Find MSNBC on Facebook: http://on.msnbc.com/Likemsnbc Follow MSNBC on Twitter: http://on.msnbc.com/Followmsnbc Follow MSNBC on Instagram: http://on.msnbc.com/Instamsnbc #MSNBC #GunViolence #GOP