This is not true. Premiums and coverage are only allowed to vary by age and location, not preexisting conditions.
https://affordablecareactlitigation.files.wordpress.com/2019...
here are summary articles explaining trump's DOJ's efforts
https://www.brookings.edu/blog/usc-brookings-schaeffer-on-he...
https://www.cbpp.org/research/health/trump-administrations-a...
so what is your point other than to mislead?