tl;dr — Power, money, etc.

And, yet again, it paid off. Pai had a meeting with Trump at the White House to discuss the data privacy rules where he pressed the president for a second term. One part of the payoff: a piece of legislation going through Congress to kill the “Obama era” rules once and for all. Soon after, Trump renominated Pai for another term at the FCC.

http://www.theregister.co.uk/2017/04/28/fcc_chairman_ajit_pai/