It's a political tool!-----Yes, Tariffs Are a Tax. What about It? - American Thinker

As the un-American left lays the groundwork for undoing President Trump’s second-term policy goals, one of the areas in which Trump’s enemies expect to have an easy target is trade policy. - John F. Di Leo 

The left therefore declares, “A tariff is just a tax, and you believe that taxes are bad, so you must oppose it!”
Note that leftists don’t say that they themselves must oppose tariffs. 

 During the four long and painful years of the Biden-Harris regime, they never repealed any American tariffs...
So leftists are using an argument that they don’t believe, strictly because they hope it will work on their opposition...

• Every time a higher tariff rate causes a domestic importer to reject the Chinese product and choose either the other non-Chinese foreign supplier or a domestic supplier, it’s a gift to the entire world, because not just the United States, but the entire world needs to be freed from dependence on that corrupt, abusive, saber-rattling enemy nation...