It wasn't that simple.
Christie burned his bridges with the Trump campaign in October 2016 after the release of the infamous "Access Hollywood" tape. Christie was apparently convinced that Trump would never win -- so he immediately began to distance himself from the Trump campaign. The tape was released on a Friday, and the Trump team had an urgent strategy meeting in New York City the following day. Trump's senior campaign advisors huddled in Trump Tower, trying to figure out if they could salvage the sinking ship. Chris Christie refused to answer phone calls from Trump over that weekend.
His future as a player in the Trump administration was destroyed that weekend -- by his own doing.
Bannon says he did talk to Christie about being on or off the plane at 11.
Also, Bannon had to get Kushner to to dump Christie.
Chris Christie was about to get on a plane with then-candidate Donald Trump and was thought to be positioning himself to be chief of staff, and Bannon wanted to derail that possibility as quickly as he could, according to excerpts of Jared Kushner’s new book reviewed by The Daily Beast.
So, he called in Donald Trump’s son-in-law to help.
“We’ve got to keep him off [the plane],” Kushner recalled Bannon telling him.
https://news.yahoo.com/kushner-bannon-tag-teamed-kneecap-182247313.html