From the Oklahoman:
For months, political prognosticators have warned that Republican voters who support Donald Trump may sit out the general election if he isn't the GOP nominee because they view the other
candidates as sell-outs.
Now it seems Democrats could face the same problem. This became apparent during the Iowa caucuses, which Hillary Clinton won by the narrowest of margins. When her victory speech was played on live TV at the watch party of her opponent, avowed socialist Sen. Bernie Sanders, his supporters' disdain was undeniable.
As Clinton declared, "I am a progressive," the Sanders crowd erupted in booing and began to chant, “She's a liar.”
The problem for Democrats is that many members of the party's activist base now view anyone who isn't a socialist as a corporate sell-out.