"Haley isn’t someone who will inspire an insurrection or who would deny the election," said a Democrat leading a campaign to get crossover votes for Haley.
many states restrict primary participation to past voting record.
Connecticut for example: Section 9-431 of the General Statutes of Connecticut stipulates that only registered members of a political party are entitled to vote in that party’s primary, though a party may choose to permit unaffiliated voters to participate in its primary.[10]
In those places one would need to register for the appropriate party an appropriate amount ahead of time. What the field will look like overall is taking shape well ahead of time, and in some places ballots will have already been set before party registration deadlines arrive.
many states restrict primary participation to past voting record.
Connecticut for example: Section 9-431 of the General Statutes of Connecticut stipulates that only registered members of a political party are entitled to vote in that party’s primary, though a party may choose to permit unaffiliated voters to participate in its primary.[10]
https://ballotpedia.org/Primary_election_types_by_state
In those places one would need to register for the appropriate party an appropriate amount ahead of time. What the field will look like overall is taking shape well ahead of time, and in some places ballots will have already been set before party registration deadlines arrive.