Opponents of President Donald Trump’s policies rally Saturday, June 14 at Dallas City Hall, in Fort Worth, Frisco, Arlington, Denton, Carrollton, Flower

The Houston demonstration is one of several planned in the region throughout the day and is expected to draw thousands of protesters.

A suspect was arrested in connection with threats made against state lawmakers who planned to attend Saturday's "No Kings" protest at the Texas Capitol in Austin, according to the Texas Department of Public Safety.

Coordinated "No Kings" protests are underway from coast-to-coast, part of a "national day of peaceful protest" against the Trump administration that is expected to draw millions. Protesters in some areas braved wet weather to raise signs and chant slogans supporting the rights of immigrants and criticizing what they see as Trump's power grab.

National Guard to respond to Texas protests