I was once a Dem and actually voted for him... but he turned out to be far more leftist than I dared to imagine.
Although his adminstration did not "advance" the progressive agenda as much as has Biden's... he embeded progressive devotees in every Federal agency and left behind the handlers who've been running the country for the past three+ years.
THIS was the original fuse for the MAGA phenomenon. Hillary merely fanned the flames.