President Trump on Tuesday said that "any attack by Iran on anything American" will be "met with great and overwhelming force," which may, in some areas, "mean obliteration." Trump also criticized Iran's "very ignorant and insulting statement" after Iranian President Hassan Rouhani in a televised address called Trump's newly-imposed sanctions "outrageous and idiotic" and said the White House is "afflicted by mental retardation." Trump on Monday hit Iran with sanctions he called "hard-hitting" following Iran's shooting down of a U.S. drone, saying the sanctions would deny Supreme Leader Ayatollah Ali Khamenei and others "access to key financial resources and support." Iran's Foreign Ministry spokesman in response said the sanctions indicate "the permanent closure of the doors of diplomacy."

Scroll for 5 things you
need to know now