Anyone who has lived through or studied the preceding 40-year Cold War will recognize the ominous echoes of its most dangerous periods, when actual war was on the horizon or a policy option. Here are only a few random but representative examples:

1. In a March 8 Washington Post opinion article, two American professors, neither with any apparent substantive knowledge of Russia or Cold War history, warned that the Kremlin is trying "to undermine our trust in the institutions that sustain a strong nation and a strong democracy. The media, science, academia and the electoral process are all regular targets." Decades ago, J. Edgar Hoover, the policeman of that Cold War, said the same, indeed made it an operational doctrine.

2. Nor is the purported threat to America only. According to (retired) Gen. David Petraeus and sitting Senator Sheldon Whitehouse, also in the Post on the following day, the "world is once again polarized between two competing visions for how to organize society." For Putin's Kremlin, "the existence of the United States' rule-of-law world is intrinsically threatening." This is an "intensifying worldwide struggle." So much for those who dismissed post–Soviet Russia as merely a "regional" power, including former President Barack Obama, and for the myopic notion that a new Cold War was not possible.