In 76, Brown & Church won 8 late primaries. It forced Carter to fight to the end.
His June victories in NJ OH, saved his campaign
Of course, the rank & file voters were disgruntled with Jimmy. That’s not happening with Bernie.
The BIG difference is that CA is Super Tuesday, not flag day. Front loading was supposed to clear the field. It will be too muddled without enough time to get momentum.