Fourteen Republican State Senators in New Hampshire have introduced SB 271. It is a very short bill concerning national conventions of political parties. It says, “The New Hampshire delegates shall be seated and have complete voting rights.”
The motive for the bill is the expectation that in 2024, the Democratic Party will refuse to seat some or all of the New Hampshire Democratic delegates who will have been elected in the New Hampshire Democratic presidential primary. The national Democratic Party has recently determined that it wants South Carolina to hold the first Democratic presidential primary, so assuming New Hampshire holds the first presidential primary, the New Hampshire action will violate Democratic national party rules.
Three times, the U.S. Supreme Court has ruled that national party conventions are free to set their own rules about which delegates get seated. Therefore, SB 271 cannot be enforced even if it is enacted. In 1972 the Democratic national rules did not permit winner-take-all presidential primaries, but California had such a primary, and the U.S. Supreme Court upheld the right of the Democratic national convention to refuse to seat all the California delegates. It also upheld the right of the party to refuse to seat the Illinois delegation, which had broken national party rules on the required diversity of state delegations to national conventions. Those cases were O’Brien v Brown in 1972 (the California case), and Cousins v Wigoda in 1975 (Illinois).
In 1981, the Supreme Court ruled in Democratic Party of the U.S. v La Follette that the 1980 convention had the right to refuse to seat the Wisconsin delegation, because the national party rules banned presidential primaries which were open to all voters (later the Democratic Party gave a waiver to the Wisconsin Democratic Party to allow the open primary to continue to be used).