From what I've read of
@Tanks on this forum, you might call him "classically liberal" but not a "liberal" (leftist). He's just not a Trumpophile.
I cannot remember the quote from Reagan, but wasn't it something like "if someone agrees with you 80% of the time, they are an ally"?
There are a lot of classical liberals that voted Republican for 40 years that didn't vote for Trump. There are a number of people that voted for Trump as the lesser of two evils but do not love Trump. All the aforementioned are friends and allies.