The generative AI boom has sent governments worldwide scrambling to regulate the emerging technology, but it also has raised the risk of upending a European Union push to approve the world’s first comprehensive artificial intelligence rules. The 27-nation bloc’s Artificial Intelligence Act has been hailed as a pioneering rulebook. But with time running out, it’s uncertain if the EU’s three branches of government can thrash out a deal Wednesday in what officials hope is a final round of closed-door talks. Europe’s yearslong efforts to draw up AI guardrails have been bogged down by the recent emergence of generative AI systems...