St. Lawrence county in NY went 59% for Trump vs 41% for Harris.
Not necessarily. They could always calculate what the retail price would be without tariffs, then add a “tariff”-sized surcharge to that and call it due to the tariffs. No rule that says they have to tell the truth.

Or are they too afraid of being barred from the White House or getting death threats when Trumps expresses his displeasure?
It’s basically this, yeah.
Trump hires bootlickers and cowards. He definitely has a sense of that sort of thing.