Cecilia Kang

The ads by Public First Action, which started airing on Monday, are part of an escalating political war over artificial intelligence before the midterm elections.

Andrew Ferguson of the F.T.C. said in a letter to Apple that it might be violating consumer protection law by stifling conservative speech in its news aggregation service.

Adam Mosseri, who leads the Meta-owned app, testified that the company was careful to test features used by young people before releasing them.

The app said in opening statements that it was more of an entertainment platform. The lawsuit claims social media companies design products that cause personal injury.

Opening statements began in a trial claiming social media companies design addictive products that cause personal injury.

The settlement means TikTok will avoid a trial where plaintiffs had planned to argue that social media platforms are inherently defective and subject to personal injury liability.

Landmark trials beginning this week will test a new legal strategy claiming that Meta, TikTok, Snap and YouTube caused personal injury through addictive products.

Starting this week, a series of trials will test a new legal strategy claiming that Meta, TikTok, Snap and YouTube caused personal injury through addictive products.

The settlement means Snap will avoid a trial where plaintiffs had planned to argue that social media platforms are inherently defective and subject to personal injury liability.

The president has backed policies that allow the industry to grow unfettered. The mutually beneficial alliance is causing concern among some conservatives.

The comment from Brendan Carr, a Republican, raised concerns from lawmakers about how President Trump might use the agency.

The order would create one federal regulatory framework for artificial intelligence, Mr. Trump told reporters in the Oval Office.