NEW: President Trump says he is weighing whether to allow the livestream the execution of Nidal Malik Hasan, the convicted killer behind the 2009 Fort Hood massacre that left 13 people dead and more than 30 wounded. "By showing it, maybe other people won't be doing what he did," Trump says, arguing that broadcasting the execution could deter future attacks. But lawmakers from both parties are raising concerns that showing the execution could instead radicalize others. Trump says he knows what the military wants to do, but the final decision will be his. Stay up to date with the latest headlines and breaking news — download the FOX News app: ▻