It's quite simple Shim, Socialism can neither exist nor survive in a capitalist society .....and societies don't come any more capitalist than the United States of America.

I like Mr Sanders, but in nothing which I have read by him does he allude to systemic change.
He does mention Public Health Services, Free Education etc, all laudable issues, but with them come huge negatives in cost, higher taxation, cuts in living standards, brakes on financial aspiration.

In truth, is America ready for the sacrifice.
Those who will vote for Mrs Clinton or Mr Rubio certainly are not.

It's very easy to SAY you are a socialist on a paper pole but how many can "walk the walk"? I did for many years and it was not easy.