I know that North Carolina electors must vote how the state votes.No, but in many states, they pledge to vote for the majority winner.Electoral College members not bound by popular vote, court rules
A state may not direct the votes of electors.
From Wiki:
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State laws may impose a fine on an elector who fails to vote according to the statewide or district popular vote, force an elector to vote for the candidate they pledged to vote, or disqualify an elector who violates their pledge and provide a replacement elector. The states with laws that attempt to bind the votes of presidential electors are highlighted above in red.[1]