Congressman Keith Ellison  (D-MN) was in a meeting while some of his colleagues participated in a sit-in on the floor of the House of Representatives, but that did not stop his mother from prodding him to join.

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The sit-in is an attempt by Democrats in the House to force votes on gun control laws in response to the shooting at Pulse, a gay nightclub in Orlando, on June 12.

The sit-in is being led by John Lewis, who is no stranger to this form of protest.

Related: Who is John Lewis, the man leading the House sit-in?

In the 1950s and 1960s, he led sit-in protests in the segregated south.

Related: Democrats stage gun control sit-in on House floor

Ellison shared a note from his mother, adding "My scheduler handed me this note. Couldn't say no. Don't worry, Mom. I'm there."

For further proof, Ellison posted a photo, showing that he was sitting on the House floor.