Democratic Rep. Sean Casten's 17-year-old daughter Gwen passed away earlier this year due to sudden cardiac arrythmia, the family noted in a statement. "In layman's terms, she was fine, and then her heart stopped," the statement explained, noting that the young woman was healthy and that the family does not know the reason the heart issue occurred. "Gwen was a healthy 2022 teenager. She ate well, exercised, got regular check-ups, didn't suffer from any behavioral health issues, and had close relationships with family and friends. She was fully vaccinated, and quarantined after occasional positive, asymptomatic COVID tests during the omicron...