Georgia Republican Senator Johnny Isakson announced Wednesday that he will resign from his seat at the end of 2019 due to Parkinson's disease and other medical problems. "I am leaving a job I love because my health challenges are taking their toll on me, my family and my staff,” Sen. Isakson said in a statement. "My Parkinson’s has been progressing, and I am continuing physical therapy to recover from a fall in July. In addition, this week I had surgery to remove a growth on my kidney." "After much prayer and consultation with my family and my doctors, I have...