>>4205251 (lb)
Kevin Hart has (mostly) avoided criticizing POTUS. He likes to keep his comedy and politics separated. He probably declined to host the Oscars because the academy wanted him to bash Trump.
https://www.breitbart.com/entertainment/2018/06/13/kathy-griffin-slams-kevin-hart-for-not-trashing-trump-thats-a-puy-move-because-hes-a-black-man/