Mamdani and AI industry flex political power in New York, plus more to watch in Tuesday’s primaries

New York City Mayor Zohran Mamdani endorses progressive candidates in Democratic primaries, while a congressional race highlights a split in the AI industry over regulation. AI industry factions, including groups linked to OpenAI and Anthropic, spend millions opposing and supporting New York Assemblyman Alex Bores' congressional bid. President Donald Trump endorses two Republican candidates in a South Carolina runoff after prior primary losses.