An estimated crowd of 15,000 gathered outside Houston City Hall on Saturday for a demonstration against President Donald Trump and his policies. Similar protests were held around the region.

With No Kings protests planned Saturday in the Houston area, local organizers are calling for peaceful rallies, while officials like Mayor John Whitmire say they are working with organizers "to ensure that First Amendment rights are respected while maintaining public safety.

Investigates has learned local and federal law enforcement agencies in Houston are closely monitoring developments on the West Coast.