A structural change that would leave the election process feeling the same for American voters, but not require permission from the party machines, would be to institute a national primary, in like the first week of June or so, with all the candidates from all the parties on it, within reason, where through an instant-runoff process the whole list is reduced to two, who go on to a general election in November.
No conventions, no caucuses, no superdelegates, bye bye.
