Daniel Beland and David Shribman: Effects of trucker protests and Jan. 6 continue to undermine democratic institutions

The two giant North American countries - prosperous, strong and, until recently, supremely self-confident - find themselves facing twin perils.These dangers were inconceivable when the new millennium began less than a quarter-century ago: the threat of extremist domestic violence and the fresh examining of questions about political authority and the balance between individual rights and the common interest.

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