Democratic Sen. Elizabeth Warren is calling for swift reunification of children and parents in a Massachusetts immigration rally.

Warren says Saturday, “This is about children held in cages.” She also said, “This is about mamas who want their children back,” to chanting crowds.

Thousands of people opposed to President Donald Trump’s controversial policy of separating migrant families are in Boston for two planned protests. Warren recently visited a Border patrol processing center in McAllen, Texas.

The “Rally against Family Separation” began with a morning march from City Hall to Boston Common, where a large rally is about to take place. The protest is timed with other protests nationwide and is also meant to oppose Trump’s ban on travelers from certain Muslim-majority nations.

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