But he failed to top Clinton in Massachusetts, the most significant primary he contested Tuesday night. And across the South, from Texas to Virginia, she crushed him on the strength of overwhelming support from African-American and Latino voters who represent such a large portion of the modern Democratic primary.
His longshot hopes of wresting the nomination from her grasp rest on unexpected breakthrough wins that harvest large swaths of delegates and jolt the presumption of her dominance. Sanders did not get them on Tuesday night, and now must try in the large Midwestern battlegrounds of Michigan and Ohio where the race turns next.
Rivals to Republican front-runner Donald Trump likewise retain enough energy to keep fighting for a while. Ted Cruz beat Trump in three states including his home base of Texas — the single biggest Super Tuesday prize. Along with his lead-off victory in Iowa's caucuses — not to mention significant organizational and financial resources — that allows him to credibly cast himself as the most viable single remaining alternative.