Christie contacted Trump and made his final, impassioned ­appeal on July 12.

“Christie said he thinks he deserves it and he earned it,” a second Trump source said. Convinced, Trump made the ­offer.

Christie “said all the BS that Trump likes to hear, and Trump said, ‘Yeah, sure I’m giving it to you.’ ”

That didn’t sit well with Manafort, who had arranged for Trump to meet Pence in Indianapolis on July 13, and fly back together to New York the next day for a formal announcement.

After Trump tentatively decided on Christie, Manafort told Trump his plane had a mechanical problem, campaign sources said, forcing Trump to spend another night in the Hoosier State. Pence then made his case to be Trump’s No. 2 over dinner as Trump’s advisers argued that Christie’s Bridgegate troubles would sink the campaign.