I personally think the U.S. federal government is a monolith aka uniparty, where the core values of each “party” are actually the same.
They put on different surface level acts to obfuscate and split voting blocks but it’s a friendly competition where the ruling class always wins and their core agendas remain the same: more debt, more war, more corporatism, more surveillance, more taxes / inflation and more gulag tech to control their peasants.