Thousands of demonstrators marched along Fifth Avenue in New York City on Saturday for a "No Kings" protest.

Americans planned demonstrations against President Donald Trump across the U.S. on Saturday as a counterpoint to the 200,000 people expected to attend the military parade in Washington.

In New York City, the biggest "No Kings" demonstration began at Bryant Park on Saturday before moving down Fifth Avenue to Madison Square Park.

"No Kings" protests against the Trump administration are taking place today in and around New York City as part of nationwide demonstrations. Fifth Avenue was closed to traffic from 42nd Street to 23rd Street in Manhattan as protesters marched from Bryant Park.

Millions of people across the country are expected to join in protest this weekend against Donald Trump’s administration, a movement intended to coincide with the president’s planned military parade in Washington.

Demonstrators unfurled banners that read, “No Crown for a Clown” and “Trumpster Fire,” as they screamed, “Hey, hey! Ho, ho! Donald Trump has got to go!”

The rallies were among hundreds of "No Kings" protests held throughout the United States, timed to coincide with a military parade celebrating the 250th birthday of the U.S. Army in Washington, D.C. Saturday was also Trump's 79th birthday.

The First Amendment of the U.S. Constitution and Article I Section 8 of the New York State Constitution protects freedom of speech, assembly, and petition. While not an exhaustive list, here are a few rules New York protestors must follow, according to the NYCLU:

Saturday marks the first full day of Marines on duty in Los Angeles, one week after protests against Immigration and Customs Enforcement raids ignited in LA and spread to other cities across the U.S.,