A senior State Department official faced tough questions on Capitol Hill Wednesday as he defended sweeping layoffs and the dismantling of the U.S.'s lead foreign aid agency.

President Trump boasted this week that his tariffs are raising "a fortune" for the U.S. government. Tariffs could also raise prices for the back-to-school and Christmas shopping seasons.

An experimental technique that patches defective DNA with donated genetic material helped families at risk of passing rare ...