Fires campaign manager Corey Lewandowski as poll numbers slide

Trump fired his campaign manager Corey Lewandowski, who had been a controversial figure known for his aggressive style and the manhandling of a reporter. The firing signaled a shift toward a more professionalized campaign structure under Paul Manafort as the general election approached, but also reflected internal power struggles and pressure from Trump's family. It marked the end of the 'let Trump be Trump' primary phase, though the candidate's rhetoric remained largely unchanged.

"The campaign is grateful to Corey for his hard work and dedication." — Campaign statement announcing Lewandowski's departure