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.

Violence attributed to online hate speech has increased worldwide. Societies confronting the trend must deal with questions of free speech and censorship on widely used tech platforms.