Rain postpones Daytona 500, dampening event, Trump's visit

Brad Keselowski stands under an umbrella on pit road as rain forces a red flag during the NASCAR Daytona 500 auto race at Daytona International Speedway, Sunday, Feb. 16, 2020, in Daytona Beach, Fla. (AP Photo/Phelan M. Ebenhack)

Supporters line the street as the motorcade for President Donald Trump, and first lady Melania Trump, passes en route to Air Force One at Palm Beach International Airport, Sunday, Feb. 16, 2020, in West Palm Beach, Fla. (AP Photo/Alex Brandon)

First lady Melania Trump smiles as they head to their planes at Daytona Beach International Airport, Sunday, Feb. 16, 2020, in Daytona Beach, Fla. Trump was at the NASCAR Daytona 500 auto race at Daytona International Speedway. (AP Photo/Alex Brandon)

The motorcade for President Donald Trump arrives before the start of the NASCAR Daytona 500 auto race at Daytona International Speedway, Sunday, Feb. 16, 2020, in Daytona Beach, Fla. (AP Photo/Alex Brandon)

Air Force One, carrying President Donald Trump, makes a pass over Daytona International Speedway before the NASCAR Daytona 500 auto race Sunday, Feb. 16, 2020, in Daytona Beach, Fla. (AP Photo/Phelan M. Ebenhack)

Secret Service Agents search fans as they enter the Fan Zone before the NASCAR Daytona 500 auto race at Daytona International Speedway, Sunday, Feb. 16, 2020, in Daytona Beach, Fla. Extra security measures were taken at the speedway because of the visit of President Donald Trump. (AP Photo/John Raoux)

President Donald Trump, accompanied by first lady Melania Trump, greets members of the U.S. Air Force Thunderbirds at Daytona Beach International Airport, Sunday, Feb. 16, 2020, in Daytona Beach, Fla. Trump was at the NASCAR Daytona 500 auto race at Daytona International Speedway. (AP Photo/Alex Brandon)

A downpour, as viewed from the press box, forces a postponement of the NASCAR Daytona 500 auto race at Daytona International Speedway, Sunday, Feb. 16, 2020, in Daytona Beach, Fla. (AP Photo/Phelan M. Ebenhack)

President Donald Trump, accompanied by first lady Melania Trump, gives the instructions "gentlemen, start your engines," before the start of the NASCAR Daytona 500 auto race at Daytona International Speedway, Sunday, Feb. 16, 2020, in Daytona Beach, Fla. (AP Photo/Alex Brandon)

Fans watch from the grandstands as Air Force One, carrying President Donald Trump, prepares to land at Daytona International Airport before the NASCAR Daytona 500 auto race at Daytona International Speedway, Sunday, Feb. 16, 2020, in Daytona Beach, Fla. (AP Photo/Phelan M. Ebenhack)