Kind of an outlier, though, because the Republicans typically cheer free trade (but then put tarrifs on shoes, cheese, tires, etc, etc, and of course subsidize big agribusineess, Wall St., etc).
1. The Democrats are not leftists. Liberals are not leftists.
2. Ideologically speaking both US Republicans and US Democrats are Liberals and pro-free trade, Trump is an exception.
Language changes, and in American English at least, the definition of liberal has changed. If you use the word liberal to describe what we might refer to as "classical liberal", you will needlessly confuse people.