Sanders is mobilizing his supporters around "fighting oligarchy" at a time when Democrats are struggling against Trump.

Vermont Sen. Bernie Sanders will be joined in Denver next Friday by New York Rep. Alexandria Ocasio-Cortez for a stop on the former presidential candidate's national "Fighting Oligarchy: Where We

He’s facing several hundred ecstatic voters huddled outside a suburban Detroit high school — the group that did not fit inside the high school’s gym or two overflow rooms. The crowd screams in delight when he tells them that a combined total of 9,000 people had shown up for the rally.