"The decision of whether to run for re-election has not been easy. I truly love the job of being a United States Senator. But in my heart, I know it’s time to pass the torch," the 80-year-old Durbin said in a video posted to social media on April 23.

The daughter of Sen. Dick Durbin died Saturday from a congenital heart condition, the Illinois Democrat's office said. "Chris Durbin, 40, fought a heroic lifelong battle with heart disease and our thoughts and prayers are with the entire Durbin family,