PORTLAND, Maine -- The U.S. would risk enabling the spread of extremism in Europe if it stopped providing support to Ukraine in its war with Russia, Maine's independent senator said Monday in the wake of meeting with Ukrainian President Volodymyr Zelenskyy. Sens. Angus King of Maine and Jack Reed of Rhode Island, who sit on the U.S. Senate Committee on Armed Services, traveled to Kyiv last week to meet with Zelenskyy. King said he came back more certain that U.S. aid to Ukraine is vital. Ukraine is slated to receive $44.9 billion in U.S. aid as part of the recent...