Technically the United States is modeled after the 18th century concept of a liberal democracy which gave way to the dismantling of monarchs and the beginning of modern governments.
We have two parties that are only intended to balance out and explore a left-right spectrum with our laws.
I will say that since Trump, Republicans seem more openly supportive of a one party, one leader fascist rule than the ideals of Democracy. They are now denying every election loss since the insurrection, their candidates are running on conspiracies and lies, they are pushing for laws making it harder for certain people to vote, theyre banning "woke literature" or anything that encourages critical thought about American society and replacing it with brain dead "teach them to love America" nationalist indoctrination nonsense in schools, they are challenging civil rights in courts, in fact they are stacking up every tier of our government with unqualified hacks who are there to obstruct anything liberals or Democrats do, they want to impose a national identity of white, English speaking Christians as full Americans while demonizing non-english speaking, non-Christian immigrants as threatening invaders who do not belong, they seem to have no interest whatsoever in coexisting with a left wing of their country, which is what Democracy is based off of. They want liberals and liberalism completely eliminated in America and a right wing, white Christian nationalist government in its place. They truly are becoming an oppressive fascist party.