Trump said he calls Sanders "crazy" because "he's not very good"
The vice president opted out of the presidential race last October
CBS News estimates Trump is less than 150 delegates short of a majority
Rock star and his wife are feeding people in need with their "pay-it-forward" restaurant, as he also prepares for a new album
Adrian Ballinger and Cory Richards want to be the first to reach the top while sharing their journey on social media in almost-real time
With Sanders' win in West Virginia and Trump's victories there and in Nebraska, the trajectory of the 2016 race remains largely unchanged