@hightor,
I'll agree that the term "rigged" (it wasn't mine) has some pejorative implications, that aren't necessarily accurate in the present conversation. It's also true that the Superdelegate provision in the DNC rules were motivated (at least in some quarters) by concerns about possibilities not unlike the one involving Sanders today. Politics (even Democrat politics) is hardball with winners and losers, and hard fought convention fights have occurred in both Political Parties (though more frequently among Democrats than Republicans in the last few decades). I don't have any theoretical beliefs or concerns on this matter - the situations both have faced are a somewhat random series of events, and the human behaviors that underlie both are somewhat similar.
The party composed of people who identify themselves as 'Republicans' is called the Republican party. I call the one composed of people who identify themselves as ' Democrats', the Democrat party. To me It's a matter of grammar and English usage.. Perhaps we should start calling the members of Nancy Pelosi's cohort in the Congress "Democratics" and name the party after them.
Historically believe the origin of the term arose from that of the "Democratic Republican Party in Jacksonian times - the subsequent omission of the 2nd descriptor appears to have started this mess.
My father was for many years a Democrat Congressman from Michigan, and he and a good friend from the adjoining 15th district (John Dingell Sr. - later succeeded by his son who was I believe the longest ever serving member of Congress) both called it the Democrat Party.