John Thune is the Republican senior senator from South Dakota and Senate Majority Leader.
Frontier AI legislation
Thune and Sen. Amy Klobuchar (D-Minnesota) are developing frontier AI legislation resting on a "duty of care" principle that would expose developers to legal liability for failing to manage catastrophic risks — regulating through litigation rather than pre-market review. The approach became public on August 3, 2026 in reporting that also identified the competing position held by Sen. Maria Cantwell (D-Washington), who has contemplated a pre-deployment regime under which the government would vet models before release. Commerce chair Ted Cruz (R-Texas) opposes giving the government power to block a release and favors the duty-of-care approach; the Thune, Klobuchar and Cruz offices did not respond to requests for comment on the account (Source: washingtonpost.com).
Klobuchar said at a July 30, 2026 Senate Commerce telecommunications subcommittee hearing that she and Thune aimed to produce a bill setting federal AI standards by the end of the August recess, telling the panel, "We can't just stand down and not have coordinated standards" on frontier models (Source: insideaipolicy.com). Neither the bill's text nor its position on preemption of state AI law had been made public as of early August 2026.
Relationships
- related: Amy Klobuchar (co-author); Ted Cruz; AI and Tort Liability (the duty-of-care instrument); AI Pre-Release Vetting (the competing instrument); AI Federalism (the preemption question the bill carries)