Congressman John Shimkus has picked up the endorsement of the U.S. Chamber of Commerce for his upcoming Primary race. The endorsement by the U.S. Chamber was announced at Kingery Printing Company in Effingham on Thursday with Maggie Sheely of the U.S. Chamber of Commerce in attendance for the announcement. Shimkus is locked in a battle with State Senator Kyle McCarter for the Republican nomination for the 15th district Congressional Seat. The primary election is set for March 15th.