It has effect! People are buying less American.
According to Systembolaget (the liquor monopoly of Sweden), there has been a drop in sales of American liquor by 17% this year. This is likely caused by boycotts after the tariffs introduced against Europe.
Long term, this may have an effect on which goods they buy in.
You shall not unleash the wrath of the clenched fist in the pocket
For demons run when a good man goes to war.