GOP isn’t even going to run primaries for the presidency in some states, even though they are entitled to.
Since political parties and the primary process were never mentioned in the Constitution - like in most other countries - US political parties have taken it upon themselves to do everything possible to concentrate power in as few hands as possible. The Democrats and Republicans have developed into public/private hybrids where states are legally required to pay for political primaries or caucuses but the political parties don’t have to accept the results at the national level. Would it be politically wise to reject a slate of delegates from a state? Maybe, but no federal law requires a political party to abide by them.
If the DNC wanted to pick their candidates out of hat at the national convention or hold a Jello wrestling contest there is nothing stopping them.
