It may be that our two-party dynamic, being focused primarily around left vs. right, largely ignores the authoritarian/libertarian axis of the political compass [1], meaning both parties have authoritarian wings internally. In times of stress/shock, real and/or perceived, it seems that each political tribe is willing to cede power to its authoritarians, based on its values: currently, the left does so for health and the environment, and the right for border security and violence from the "other". And of course, these values can shift based on political winds and alliances of convenience; I'm watching HBO's "The Plot Against America", and from a modern perspective, it's strange to see the FDR economic progressives be the hawks, while the (original) America First-ers are the doves.
(While I lean libertarian on the political compass, I'm not a-priori judging all authoritarianism to be evil; there are arguably times such as a pandemic or a world war where some amount may be necessary.)
[0] https://www.nytimes.com/2020/03/28/opinion/coronavirus-trump...