Trump is a liberal.
Define "liberal". I ask not to be a smartypants, but because that term has lost all definitive meaning in the larger world due to the plethora of interpretations which abound everywhere.
The only really consistently accurate definition I find for "liberal" in my own examinations of evidence is the term "anti-conservative" since it is defined as 'being in opposition to anything or anyone who self-identifies as conservative".
Liberal most definitely does NOT mean Classical Liberal, since those Enlightenment-derived values are embodied more by conservatives in our current age far more than anyone who self-identifies as "liberal".
I'm guessing that you are referring to, "big government Statist" (likely correct, if not nearly as bad on his worst day than Hill-O-Lies on her best) and Trump has a history of that for sure. NOT GOOD!!
What I always say about his leftist (anti-conservative) proclivities is that Trump may be able to better obtain a second term if he moves right and away from his leftist inclinations, since conservatism generally is a synonym for "intelligent" and for that reason, more likely to be a guideline for effective policy-making.
The only time self-described moderate leftists generally forgive a president their conservatism is when the president is able to actually improve the conditions of the nation dramatically - as Ronald Reagan did in his two terms. Even a lot of leftists generally acknowledged that RWR was a decent president at worst.