theatre, just not masterpiece...
If there were rational debates over the solution of issues common to the electorate, I would not care who was running.
But in the US, the politics of dogma overrides the eminently practical approach of most of America.
Hence the installed bases of the "left" and "right" (there is no difference - they are simply heading power structures with different monetary interests), are fighting tooth and nail to keep the "massaged candidates" on view.
I know nothing of Trump or Sanders (and neither do *you*), but they are not approved and that suggests this is all theatre.
Better have an election or someone will suspect it is fixed...