Sen. Thad Cochran, R-Miss., announced on Monday that he would be resigning in April. Paul Morigi/Getty Images hide caption
roger wicker roger wicker
Sen. Thad Cochran, R-Miss., announced on Monday that he would be resigning in April. Paul Morigi/Getty Images hide caption
Mississippi state Sen. Chris McDaniel is expected to make his primary challenge against incumbent Republican Sen. Roger Wicker official on Wednesday. Rogelio V. Solis/AP hide caption