Sean Casten

Illinois Rep. Sean Casten announced on Monday that his 17-year-old daughter, Gwen, has died.  “This morning, Congressman Casten’s beloved daughter, Gwen (17), passed away,” the lawmaker’s office wrote on Twitter. “The Casten family requests privacy, and we will be issuing no further comment at this heartbreaking time.” Gwen died inside the family’s home, the Chicago Tribune reported, citing local police. Casten, 50, and his wife, Kara, are also parents of Audrey, 15. Earlier this month, Gwen appeared in a campaign video supporting Casten’s bid for a third term in Congress. In the clip, Gwen, a gun control activist, expressed excitement about turning 18 and being able to vote for her father in the upcoming election.  “Sean Casten is working to pass real gun reform like universal background checks to protect our neighborhoods and classrooms,” Gwen said. She also noted that he’s “fighting to make sure that women can make their own health care choices.”