Likely 2016 presidential candidate Jeb Bush has declined an invitation to speak at a conservative summit in Iowa hosted by Rep. Steve King (R-Iowa.), a sometimes controversial figure in the GOP. A Bush aide told The Hill that the former Florida governor appreciated the offer to speak at the Iowa Freedom Summit in late January but that he would not be able to attend. The Washington Post first reported on Wednesday that Bush had declined the invitation to the summit, which will feature a host of other potential GOP presidential contenders, including Gov. Chris Christie (N.J.), Sen. Ted Cruz (Texas),...