Case law and Supreme Court precedent is clear, I believe.
The primaries belong to each individual party, and the state is only the administrator. A party is free to do whatever it wants as a primary or caucus procedure, as long as it is willing to be the direct administrator of the process.
“Case law and Supreme Court precedent is clear, I believe.”
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Not when Democrats are in power. What’s stopping them from ignoring the Supreme Court? Biden ignored the Court’s decision re student loans and virtually nothing happened.