Christie sold his soul for a ride on the Trump train - and is now an unperson in the Trump camp. According to reports, his behavior during the Bridgegate trial "sickened" Trump, who thought he threw his aides to the wolves. And let's not forget that Christie was the prosecuting attorney who sent the father of Trump's son in law up the river for a few years. To top it off, Trump was apparently incensed when, after PussyGrabGate broke, Christie abruptly canceled his TV appearances as a campaign surrogate.
Poor Chris - he had high hopes for a cabinet position, and left his state behind in his quest for power and glory. Meanwhile, back in NJ, his approval ratings are in the low 20s since he basically hasn't governed since 2015.