The Democratic primary to replace retiring U.S. Sen. Dick Durbin has become a political test for Gov. JB Pritzker, who is backing Lt. Gov. Juliana Stratton over two established U.K. House members Raja Krishnamoorthi and Robin Kelly. Pritzkers has invested millions into Stratton's election and has even appeared in an expletive-filled TV ad aimed at Donald Trump. However, this has been met with criticism from prominent Black Democrats and concerns about his influence in politics. The winner of the 10-way Democratic primary is expected to win outright in November.