Republicans have a retirement problem. And it's only going to get worse.

In the last 10 days, four Republican House members have announced they won't be running again in 2018.

One of those four was Rep. Frank LoBiondo, who leaves behind a very competitive district in southern New Jersey. "As some of my closest colleagues have also come to realize, those of us who came to Congress to change Washington for the better through good governance are now the outliers," LoBiondo said in his retirement statement. "In legislating, we previously fought against allowing the perfect to become the enemy of the good. Today, a vocal and obstinate minority within both parties has hi...