Sen. Tom Cotton, R-Ark., traces what led up to the 'grave threat' of Iran's nuclear program on 'Life, Liberty & Levin.' #iran #nuclear #trump #foxnews #fox #news Subscribe to Fox News! https://bit.ly/2vBUvAS Watch more Fox News Video: http://video.foxnews.com Watch Fox News Channel Live: http://www.foxnewsgo.com/ FOX News Channel (FNC) is a 24-hour all-encompassing news service delivering breaking news as well as political and business news. The number one network in cable, FNC has been the