Former Secretary of State Hillary Clinton took aim at one of President Donald Trump’s greatest insecurities on Sunday, needling him over the lackluster crowd at his Washington, D.C. military parade this past weekend.

The parade was the spectacle event Trump had long wanted. It also helped sparked the largest mass opposition to him since his inauguration 145 days earlier.

A 33-mile trip from one protest in Annapolis, Md., to the parade grandstand in front of the White House was like a journey between two different countries.

As millions of Americans protested at “No Kings” rallies across the country, onlookers gathered in Washington on the president’s birthday for a muted celebration.

Trump had long dreamed of holding a parade showcasing America’s military might, and this one featured a steady stream of Abrams battle tanks, a fleet of armored Stryker and Bradley fighting vehicles, a flock of artillery launchers, as well as Black Hawk, Apache, and Chinook helicopters.