Eight Democratic lawmakers were arrested Tuesday while advocating for immigration reform at a sit-in on the National Mall in Washington.

Reps. John Lewis (D-Ga.), Charles Rangel (D-N.Y.), Joseph Crowley (D-N.Y.), Luis Gutiérrez (D-Ill.), Keith Ellision (D-Minn.), Jan Schakowsky (D-Ill.), Raúl Grijalva (D-Ariz.) and Al GreenAlexander (Al) N. GreenDem rep: Trump disaster aid request is 'how you let America down again' House Dems introduce articles of impeachment against Trump Dems to launch new impeachment push on Wednesday MORE (D-Texas) were among the estimated 200 people arrested by U.S. Capitol Police for protesting in the streets.

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While most of Washington’s parks have been shuttered because of the government shutdown, Tuesday’s demonstration was allowed because public areas are still available to citizens for First Amendment-related activities.

Immigration activists have recently sought to reignite debate over the issue. The Senate passed a comprehensive immigration reform bill over the summer, and while the House Judiciary Committee has passed some small bills in response, Speaker John BoehnerJohn Andrew BoehnerTrump's pick for Federal Reserve chief is right choice at right time The two-party system is dying — let’s put it out of its misery One year later, neither party can get past last year's election MORE (R-Ohio) has declined to bring those up for a floor vote. 

Lewis, the famed civil rights activist who has frequently engaged in similar acts of civil disobedience, said over Twitter that it was his 45th arrest.