If Joe Biden wants to be President he has to win over Bernie Sanders disgruntled voters.
Biden has created Unity Task Forces to define his policy for the general election.
Leading progressive activists are faced with a difficult choice: Support Biden and compromise or face blame for a Trump victory.
According to the Atlantic Bernie's supporters are staunchly divided.
Eighteen top Sanders supporters and progressive activists accepted appointments to the task forces.
Some Sanders supporters will not for Biden under any circumstances.