First Stacey Abrams romped to victory in Georgia’s gubernatorial primary. Then came Ben Jealous in Maryland and, on Tuesday, Andrew Gillum. Five years after the rise of Black Lives Matter — and against the backdrop of a White House that has inflamed racial tensions nationwide — Gillum’s upset win in Florida laid bare the potency of a new generation of black leaders gradually coming to power within the Democratic Party. With Gillum’s defeat of former Rep.