Quote:Sanders could be a source of consistent, left-wing pressure on party leadership, whether or not he runs in 2020. If he intends to build a lasting political movement out of the remnants of his last presidential campaign, he’ll need to become an effective counterweight to the mainstream Democratic Party. But based on his ICE comments and the uneven results of his campaign efforts, Sanders no longer seems like such a sure figurehead for disgruntled Democratic voters.