Trump was written off by all at the beginning of his quest for the presidency. Look what happened. Sanders was opposed by all of the DNC, the Democratic establishment, newspapers, radio, and TV mocked him. He has a very narrow chance of being the Democratic nominee. He has not quit nor am I going to quit supporting him. I don't trust Clinton under any circumstances and she has a federal investigation hanging over her head, has not revealed what she said behind closed doors from big money donors, flip-flopped on every issue, and has even shanghaied Senator Sanders' agenda. 

A lot of people will have to think hard about their choice IF Trump is the ultimate Republican nominee and Clinton is the Democratic nominee. These are the times that try our souls.