Lewandowski’s dismissal has been in the works for weeks, and it marks the culmination of an intense lobbying campaign by Trump’s three oldest children — Ivanka, Eric, and Don Jr. — as well as allies of campaign chairman Paul Manafort, who eclipsed Lewandowski to some extent when Trump brought him on earlier this year. For most of the campaign, Trump remained loyal to Lewandowski even during his many scandals, such as the battery charge for allegedly roughing up a female Breitbart News reporter. But in recent weeks, according to sources, Lewandowski crossed lines that ultimately gave his detractors enough ammunition to convince Trump to dump him.
Sources said one of Lewandowski’s mistakes was leaking dirt about Ivanka’s husband, Jared Kushner, to reporters. Word of Lewandowski’s whisper campaign made its way back to Manafort allies. Other Lewandowski detractors told Trump that the soap opera around Lewandowski was getting the campaign off message. And they were also frustrated that Lewandowski seemed to encourage Trump’s worst behavior, including his attempts to delegitimize the Indiana-born federal judge presiding over Trump University by describing him as a “Mexican.
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But now with Trump’s poll numbers falling well behind Hillary Clinton's, Lewandowski lost his bulwark — and Trump was finally willing to fire him. As one adviser put it to me: “The real lesson here is everyone is expendable except for the kids. It’s tribal.”