Sergey Brin and his girlfriend, Gerelyn “GG” Soto, at a White House artificial-intelligence dinner last year.

Many undocumented immigrants who want to file tax returns have sought the help of clinics like this one in Los Angeles.

Tear gas and smoke at a protest in Nairobi, the Kenyan capital, on Wednesday. As demonstrations flared, banks and businesses in the center of the city were closed amid a heavy police presence.

Legislation being advanced by Republicans in Congress would substantially increase the tax bills for many foreign companies that operate in the United States, raising more than $100 billion over a decade.

President Trump’s budget proposes deep reductions for nearly ever major federal agency, reserving its steepest cuts for foreign aid, medical research, tax enforcement and a slew of anti-poverty programs.