Rep. Sam Graves, a Senior House Republican, Will Retire as Midterm Exodus Grows

Representative Sam Graves, the chairman of the Transportation and Infrastructure Committee, said he would leave Congress after nearly three decades, the latest sign that the G.O.P. is bracing for big losses.

​ Representative Sam Graves, the chairman of the Transportation and Infrastructure Committee, said he would leave Congress after nearly three decades, the latest sign that the G.O.P. is bracing for big losses.