Christopher Lebron lists them at the Boston Review. Do any of them sound familiar?
Sign 1: Leader Insists on Mass Public Adoration.
Sign 2: Regime Controls the Truth.
Sign 3: Regime Suppresses Knowledge Producers.
Sign 4: Regime Invents Common Enemies.
Sign 5: Leader Is Surrounded by Cronies and Sycophants.
Follow the link for a detailed discussion of each one.