The Democratic Socialists of America, as an institution, has been hijacked by young revolutionaries. They have turned it into a communist outfit, devouring the Democratic Party from within. Republicans should not grin with smug self-satisfaction. This is dangerous for them, even though blue moderates and establishment figures feel the heat right now. Once a marginal group committed to social democracy, DSA has become a major vehicle for third-worldist communism. It rejects everything that made America a first-world superpower. Its activists push open borders, the abolition of police and prisons, the dismantling of constitutional checks, and solidarity with America's enemies abroad....