If she loses the general she has to go down in history as the biggest failure in American politics ever.
Lose to a Black guy with a Muslim-sounding name in a country founded on slavery and obsessed with anti-Muslim sentiment... who was very unknown before running against you

Struggle mightily with an old Jewish man who calls himself a socialist in a country that has gone through multiple Red Scares... who was also very unknown before running against you

Lose against a guy whose only real constituency is poorly-educated cac males