The modern Democratic party wants a racial socialist, or a white communist.
There is zero chance Trump could come within ten miles of the Democratic nomination.
the party leadership wants the things you say, but they do hold primaries and we bet Trump could, well, trump Hillary with most of the D voters (if they were give the choice...)
just my humble opinion. we see the D party as having been taken over by some activist extreme leftists, backed up with billions of dineros ..... but many D voters we meet are not in love with the communistic policies