Cities large and small were preparing for major demonstrations Saturday across the U.S. against President Donald Trump, as officials urge calm, National Guard troops mobilize and Trump attends a military parade in Washington to mark the Army’s 250th anniversary.

From protests to parades to the president's birthday, this weekend's itinerary is packed. Here's what to know about 'No Kings' protests in Florida

Social media chatter escalates as white nationalist ​organizations capitalize on Saturday’s planned demonstrations against Trump policies.