How can they force the Dems to put someone else on the ballot? Senator Sessions is running unopposed in AL.
Kansas has a statute that requires them to do this. The reason for these statutes is that both political parties in Kansas were putting forward straw candidates for the state legislature in the primaries. After the primary was over, the straw candidate would withdraw and the party would replace them with the candidate of their choice, ensuring that the name on the ticket for the general was the party's choice and not some nug selected by the voters.