The Brookings Institution suggests that federal statistics are an undercount because immigrant parents are not being asked about or not disclosing their American children.

A YouTube series starring Transportation Secretary Sean Duffy and his family is part of the nation’s 250th anniversary celebrations, but it doubled as a family excursion for them.

Greg Brockman, OpenAI’s president, testified in a trial pitting Mr. Musk against his company that the world’s richest man was eager to change how it operated as a nonprofit.

In the trial’s first day of testimony, Elon Musk said greed led co-founder Sam Altman to pull the A.I. lab away from its nonprofit roots. OpenAI says that’s nonsense.

Mr. Musk’s lawsuit against Mr. Altman and OpenAI makes the case that all-encompassing greed is Silicon Valley’s defining feature.

Using philanthropy for campaign donations is illegal. But an exception for some nonprofits has allowed Democratic billionaires like Bill Gates and Michael Bloomberg to remain anonymous when they want to play politics.

The Giving Pledge, once trendy among the world’s richest, has come upon hard times.