I'll point you to this NYTimes article where they address some of those Daily News questions and answers:
http://www.nytimes.com/2016/04/07/upshot/yes-bernie-sanders-knows-something-about-breaking-up-banks.html?_r=0

About how he would get these things through congress? I think it would be a pretty tumultuous ordeal, but if he gets into office then that means he has the people behind him which is a pretty big deal. Congress will see the writing on the wall and it would begin that tough process of changing most American's relationship with the government and having more of a vested interest. I'm of the mind that even if he doesn't get each policy through that at least one or two of the game changers would get accomplished and we would have momentum for more going forward. Believe me that the young people would stay engaged especially if there is push back from the right.