#ArticleIV, #Section4 of the U.S. Constitution states: "The #UnitedStates shall #guarantee to every #State in this #Union a #Republican Form of #Government, and shall #protect each of them against #Invasion; and on #Application of the #Legislature, or of the #Executive (when the Legislature cannot be convened) against #DomesticViolence." (1/3)
A republican form of government, as outlined in the guarantee clause of the U.S. Constitution, is a system where the power is vested in the hands of the citizens who elect representatives to make decisions on their behalf. In a republican government, elected officials are accountable to the people and must govern according to the rule of law, typically enshrined in a constitution. (2/3)

This form of government contrasts with a monarchy or dictatorship, where power is concentrated in the hands of one individual or a small group without the consent of the governed.

So establishing a one party rule is not a Republican form of government, and would require the federal government to take action. (3/3)