The Republican National Committee disregarded all voting from citizens during the 2016 caucus and even tampered with the delegates in order for them to land a win for their choice Candidate. Not THE PEOPLE's choice.
This is highly unethical, but not illegal.
The US Constitution is unclear on the voting rights of all citizens. This leads to abuse from parties to push votes for their favor and does not always reflect the voice of THE PEOPLE.
Forcefully push for an Amendment that gives the voting power to THE PEOPLE not to politicians or political parties.