Eli Lake makes an interesting comparison in The Trump-Cruz Police State Exists. It's Called France. Here's an excerpt:
Imagine if Ted Cruz or Donald Trump proposed a policy to monitor thousands of Muslim citizens even if they had no specific ties to terrorist groups. Then, for good measure, they called for a new law to allow the police to search the homes of suspected terrorists without a warrant and to place terror suspects under house arrest without a court order.
Sounds like a nightmare. One can imagine the indignation. Pundits and politicians of good conscience would intone against the politics of fear. Some on the right would respond that political correctness should not be a barrier to counterterrorism.
But what I have just described is not a Republican sound bite. Rather, it is the current counterterrorism posture of France. Since the attacks in Paris last November, the socialist government of President Francois Hollande has placed his country under a state of emergency. France's national guard has been deployed to protect sensitive religious sites and other "soft targets." The country of Voltaire, Diderot and Camus is in 2016 the police state that critics warn Cruz or Trump would bring about if given the chance.
Yeah. Sounds like a police state all right. Here in the U.S. it would be supported by supporters of whomever is president and opposed by his/her opponents. People seem willing to give up liberties for the ones they love. Happens at all levels, from family to top government.