Fiery left-wing Rep. Alexandria Ocasio-Cortez and Barstool Sports founder Dave Portnoy tangled on Twitter Tuesday over organized labor in a clash of the social-media titans. “Hey @aoc welcome to thunder dome,” Portnoy, a well-known right-leaning agitator, challenged the New York congresswoman. “Debate me.” Portnoy threw down the gauntlet after AOC injected herself into a battle Portnoy was waging on another front over the recent formation of a union by workers at The Ringer, a sports site in competition with Barstool Sports. “Heard @ringer employees want to unionize. Little refresher how I feel about unions,” wrote Portnoy on Monday.