Who injected Bernie's voice into the American mainstream. That would be Hillary Clinton. In 2015 - 2016 Hillary stepped in to float the very broke DNC; therefore, controlled it. Hillary brokered a deal with Bernie to allow him to run under the DNC banner to have his socialist message heard on a national level instead of the independent / socialist banner where his message would have been severely contained, but done for a price. The price was Bernie had to leave stage left when asked to do so without complaint, which as we know he complied with little complaint when asked to do so in 2016. Bernie knew in 2016 he was just programmed opposition to the Hillary Clinton campaign. Bernie was in on the sabotage of his own campaign, but succeeded in planting the seeds of socialism throughout the land. Just one more gift of the Clinton's largess. To bad Seth Rich did not get the game plan, Seth thought Bernie was in it to win it. Bernie has blood on his hands, no doubt.