the democratic party has fuzzy boundaries. he calls himself an independent but caucuses with the democrats and participates in their primary elections. 1/
US parties are blobby, indeterminate things is the point of the original post this comments on. 2/
but despite there are people perceived to be disproportionately influential within those vague coalitions. donors, the Obamas, the Clintons, people like Jim Clyburn at a state level. 3/