It is resolved, as far as the official legal and political system is concerned.
Only chance for a challenge would be for the relevant election official or board to refuse to put her on a primary ballot.
If she were to get the nomination, she would almost certainly not face serious challenge. It would be considered purely political question at that point, to be resolved by voters.
If she were to get the nomination, she would almost certainly not face serious challenge.
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You think President Trump would roll over like McLame did?