A republican form of government isn’t the republican party. That adherence to republican principles have been thrown out the window a very long time ago. The federal government, national government (the Congress), and SCOTUS all don’t adhere to federalism.
So what is a republican form of government?
The Republican Form of government is one in which the powers of sovereignty are vested in the people and are exercised by the people, either directly, or through representatives chosen by the people, to whom those powers are specially delegated.
What is federalism?
Why federalism isn’t working today? Because of reforms made on federalism during the progressive era.
What is progressive?
What are statists?
Federalism isn’t working because it isn’t allowed to work. Because our state legislatures no longer have a role in the national government. The states are now of subject to the federal government in lieu of the national government, sanctioned by the SCOTUS. Why? Because the national government has lost the ability to govern. In this event, power must be restored to ‘WE THE PEOPLE’.
The State governments may be regarded as constituent and essential parts of the federal government; whilst the latter is nowise essential to the operation or organization of the former. Without the intervention of the State legislatures, the President of the United States cannot be elected at all. They must in all cases have a great share in his appointment, and will, perhaps, in most cases, of themselves determine it. The Senate will be elected absolutely and exclusively by the State legislatures. Even the House of Representatives, though drawn immediately from the people, will be chosen very much under the influence of that class of men, whose influence over the people obtains for themselves an election into the State legislatures. Thus, each of the principal branches of the federal government will owe its existence more or less to the favor of the State governments, and must consequently feel a dependence, which is much more likely to beget a disposition too obsequious than too overbearing towards them. -Madison: Federalist 45