15th District Republican Congressman John Shimkus will not change his mind about leaving Congress. In a statement released late Monday, the veteran Collinsville legislator announced that he has reaffirmed his decision to not run for re-election. Shimkus says he was asked by Republican Party leaders in Washington and on the local and state level to change his mind and remain, but after weighing the pros and cons and speaking with his family he says he will retire and looks forward to finishing out the 116th Congress.