Live updates: Trump slaps tariffs on top trading partners; Martin to lead Democrats
Mexico, Canada announce retaliatory measures following Trump tariffs
National Air Traffic Controllers Association president addresses staffing shortage
Buttigieg mulling Senate bid after nixing play for Michigan governor
Wall Street Journal slams Trump's tariff plans: 'The dumbest trade war in history'
Watch live: NTSB gives update on DCA crash investigation
Michael Steele hits Trump for attempts to distance from FBI firings: 'Cut the crap'
Trump signs tariffs on Canada, Mexico and China
