Historical parallels for a tense political climate

Which historical period most resembles today’s political climate?

The closest parallels are the 1920s, early 1930s, and perhaps the 1890s, although none is an exact match.

The 1920s, early 1930s, and perhaps the 1890s offer partial parallels for the political climate under discussion. None supports a simple one-to-one comparison because every period contains important differences. Historical analogy can identify recurring pressures without predicting an identical outcome.