The lawyer for the illegal immigrant accused of killing an Iowa college student suggested Wednesday that President Trump has tainted his client’s chance to get a fair hearing by publicly talking about the case. Cristhian Rivera made his first appearance in an Iowa courtroom Tuesday on first degree murder charges in the slaying of Mollie Tibbetts, whose disappearance last month drew national headlines. The judge set Mr. Rivera’s bail at $5 million, cash-only. Mr. Rivera, according to investigators, admitted to having accosted her while she was jogging July 18, and then hiding her body. He led police to her body...