Answer: You can't
Trump draining the swamp in own backyard first.
My Trump vote is reaffirmed.
I think that trump knew who and what Christi was from the beginning when Christie started to support him in the primary. I think he knew if he gave him enough rope he would hang him self and President Trump could get rid of him with out alienating those that support him. it was smart to give him a job that when he failed to do what Trump wanted and started to actively work against the administration he could fire him and be done with what ever influence he would have. you wont see Christie being given any other jobs in the administration.