SEATTLE – Thousands of people across the U.S. marched in rain, snow and sweltering heat Saturday to demand action on climate change — mass protests that coincided with President Donald Trump's 100th day in office and took aim at his agenda for rolling back environmental protections. At the marquee event, the Peoples Climate March in Washington, D.C., tens of thousands of demonstrators made their way down Pennsylvania Avenue on their way to encircle the White House as temperatures soared into the 90s. Organizers said about 300 sister marches or rallies were being held around the country, including in Seattle, Boston and San Francisco.