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 has finally spoken out about his military parade on Saturday, which was held in Washington, D.C. to celebrate the US Army's 250th birthday and his own 79th birthday

Follow the live updates on D.C.’s massive military parade in celebration of the Army’s 250th birthday on President Donald Trump’s birthday.

Donald Trump has been mocked online after a smaller-than-expected crowd showed up for his military birthday parade Saturday. Numbers were bolstered by significant protests during the celebration on his birthday.

As a military parade rolls through Washington, DC, on Saturday – President Donald Trump’s birthday – millions of Americans are expected to protest in what organizers predict will be the strongest display of opposition to Trump’s administration since he took office in January.

The 'No Kings' demonstrations this weekend—which were attended by as many as six million people—are some of the most prominent examples.

Demonstrators began gathering in cities and towns across the U.S. Saturday to rally against President Donald Trump as officials urged calm and mobilized National Guard troops ahead a military parade to mark the Army’s 250th anniversary that coincides with the president's birthday .