The Financial Post reports in its Friday edition that investors in the artificial-intelligence stock rally now face a major risk: politics could hinder progress more than high valuations and spending. A Bloomberg dispatch to the Post reports that the U.S. administration's decision to block foreign nationals from accessing Anthropic's advanced models over security concerns led it to disable access to both models for everyone. Washington has long monitored chips used for AI, but targeting models themselves highlights a significant risk: government intervention could threaten AI companies' global presence and their earnings. These profits are essential to support high stock prices for tech firms, chipmakers and electrical equipment manufacturers. The episode shifts the narrative on AI from a competition for intelligence to a matter of national security, focusing on protecting advanced technology. The availability of models now poses an operational risk for both providers and users, especially if unexpected sanctions are imposed. Goldman Sachs partner Bobby Molavi framed it bluntly -- frontier AI is becoming "state-supervised strategic infrastructure." For now, AI sentiment is about as bullish as it gets.