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.

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.

Donald Trump threw a military parade in honor of the U.S. Army’s 250th anniversary on Saturday, June 14 (a date that happens to be the president’s birthday) to the tune of $25 to $45 million. But unfortunately for Trump, photos and videos from the big day show sparse attendance and a lack of organization from top to bottom.

More than 6,000 soldiers participated in the U.S. Army's 250th anniversary parade in Washington, D.C. — including the Texas A&M University Corps of Cadets.

Palantir, the data analysis and technology firm whose contracts with the federal government are expanding, and Coinbase, a cryptocurrency firm that donated to the president’s inauguration, also sponsored the event. Oracle, a database company whose co-founder is a close friend of Mr. Trump’s, received a shout-out on Saturday as a sponsor.

Sen. Rand Paul criticized the June 14 military parade, arguing that it was too expensive and “glorified” weapons.