Senior White House Correspondent Selina Wang reports on the ongoing fallout from the Oval Office blowup between Presidents Trump and Zelenskyy, putting continued U.S. military aid to Ukraine in jeopardy; Foreign Correspondent Tom Soufi Burridge has the latest on President Zelenskyy's trip to the U.K. as European leaders rally to his defense; Correspondent Morgan Norwood reports on former New York governor Andrew Cuomo's announcement that he will run for mayor of New York City; and more on ABC World News Tonight with David Muir.

Ginger Zee tracks a major new cross-country storm taking aim at the east coast where 115 million are on alert for blizzard conditions, high wind, and possible tornadoes, and Stephanie Ramos reports from South Carolina, where families raced to evacuate their homes as massive wildfires and thick heavy smoke blanket the state; Mary Bruce reports on Pres. Trump's news conference where he confirmed 25 percent tariffs on Canada and Mexico will go into effect Tuesday, causing stocks to tumble; weeks after a deadly midair crash over the Potomac River, Gio Benitez has details on multiple pilots saying they received what appear to be false collision alerts on final approach to Reagan National Airport, and more on tonight's broadcast of World News Tonight with David Muir.