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This moratorium could only be lifted after comprehensive action by Congress.

The move has been applauded by groups most concerned about AI development but derided by other policymakers, including on the left.

Senator John Fetterman, Democrat Pennsylvania, said I refuse to help hand the lead in AI to China and Senator Mark Warner, Democrat Virginia, simply said idiocy.

The response rhymed with that of the White House in their AI framework released 12 days ago that emphasized winning the race and a light-touch approach to AI regulation.

It was also the White House whose memo nixed an attempted bill by Doug Fiefier, Republican Utah, to require AI companies to publish safety and child protection plans.

There's an image here.

That was the landscape as of Sunday.

Then a leading AI company, if not the leading AI company, put its money, at least a few hundred billion dollars of it, where its mouth is and said that no, AI really is that dangerous and drastic action is warranted.

A reasonable person might still disagree, but it is no longer reasonable to dismiss the AI concern position out of hand.

Not unless you can explain why Anthropic made this staggeringly costly move.

Sanders, who introduced the much-derided data center moratorium five days earlier, said when a $380 billion company decides the danger is too great to continue, perhaps it's time to stop laughing at those of us who've been saying the same thing.

Lawmakers are compelled and the once-fringe bill has gained three new Senate co-sponsors and five in the House.

Modest numbers, but a notable increase from zero occurring in just the last 48 hours.

You ought to hear them out is the attitude sweeping through Washington as policymakers are scrambling to make sense of the development.

Congressional hearings are expected with anthropic leadership and other notable figures across the AI sector.

Anthropic's move will likely also provide cover against White House pressure to marginalized AI-concerned voices on the right such as Utah Governor Spencer Cox, R., Brendan Steinhauser, a former Republican strategist, and other state legislators like Doug Fiefier.

Even more dramatic changes may be afoot when the House and Senate are likely to flip in the midterm elections.

The reaction isn't limited to US.

Across the globe, there has been a flurry of reactions.

UN Secretary-General Guterres has called for the July Geneva Dialogue to be elevated to an emergency ministerial session, citing the anthropic pause as impetus to further develop the creation of an AI equivalent to International Atomic Energy Agency, IAEA, the main international body for nuclear non-proliferation.