President Donald J. Trump has wide latitude to enact the sweeping changes to U.S. foreign policy that he has promised, but his executive authority is constrained by congressional legislation, treaty …

President Trump’s reversal of half-century-old U.S. policy will in practice change little in the strategic territory occupied by Israel, but it could have far-reaching diplomatic reverberations.

President Trump’s decision to recognize Jerusalem as Israel’s capital and relocate the embassy there could set back the Israeli-Palestinian peace process.

Tariffs have been applied over the years to protect homegrown industries and target competitors who are seen as using unfair trade practices. They impose costs on both importers and exporters and had been in decline until the recent U.S.-China trade war.