Sen. Bernie Sanders knows what he wants. In a Washington Post op-ed last week, the democratic socialist from Vermont laid out a legislative agenda for the 116th Congress’s first 100 days. Among the dizzying array of proposals Mr. Sanders pushed were his signature “Medicare for All” bill, tuition-free college, student-debt relief, tax increases requiring “wealthy people and large corporations to begin paying their fair share” and a $15 minimum wage indexed to “median wage growth,” not inflation.Others in the Democratic Party’s increasingly influential democratic-socialist wing are pressing for their own major legislation to pass the House, even if it will go nowhere in the Republican Senate. Rep.-elect Alexandria Ocasio-Cortez, for example, wants a “Green New Deal.” Sounding too much like a Maoist functionary, she describes it as a “national, industrial, economic mobilization plan” to make America carbon neutral.Ms. Ocasio-Cortez’s plan would end U.S. use of nuclear energy and fossil fuels—coal, oil and gas—within 10 years. She promises to upgrade “every residential and industrial building for state-of-the-art energy efficiency, comfort and safety” and “virtually eliminate poverty” by guaranteeing “a living wage job to every person who wants one” while mitigating “deeply entrenched racial, regional and gender-based inequalities in income and wealth” through a universal basic income, universal health care and other measures.