Although my prefrerrd candidate, Eugene McCarthy, won by far the largest percentage of the popular vote in the Democratic general primaries—approximately 3 million or 38.7% to Humphrey’s 161 thousand or 2.1% in a crowded field of candidates—Humphrey didn’t even bother to enter some of the state primaries. Nonetheless, party officials gave Humphrey the right to carry the Democratic banner as its presidential nominee.

It did this by awarding Humphrey the vast majority of overall delegates in the non-primary states, thereby bringing him over the top in terms of the number of delegates needed. Talk about “rigged elections”!

There's also this. The entire thing is him describing the democrats as party that would prefer to loose by drifting to the right, rather than utilize its left flank.