Trump deployed border agents to Portland and Seattle. This map shows where they are legally allowed to operate.

Nathan Howard/Getty Images

• President Donald Trump ordered Customs and Border Protection agents to Portland and Seattle last month to quell unrest in those cities.

• This may have come as a surprise as the CBP is mostly known for policing US land borders, especially near Mexico.

• CBP agents are actually allowed to operate anywhere within 100 air miles of America's borders with Mexico and Canada, as well as the entire coastline.

• This 100-mile area encompasses big cities like Chicago, New York City, and Los Angeles.

• The zone includes every state that voted Democratic in the 2016 presidential election, with the exception of Colorado and Nevada — the only blue states outside the zone.

• The ACLU has published information so that people who live within this zone — which make up two-thirds of the US population — know their rights when interacting with CBP agents.

• See the map below.

• Visit Business Insider's homepage for more stories.

Yuqing Liu/Business Insider

Read the original article on Business Insider