Just over a year has passed since Election Day 2016, and a special counsel plus three congressional committees continue to struggle to figure out whether Russia colluded with the Trump campaign to help tip that election.

That is a hugely important question, of course. But the danger in focusing on it too much is that the country could lose sight of a broader and more pernicious reality: Whatever Russia did last year amounted to an attack on American democracy. Worse, that is only one of several ways the democratic model is...