Authoritarianism means oppressing the masses, having an undemocratic government and acting against the will of the people. It happens in Venezuela. It happens in Turkey. It happens in Hungary. It doesn't happen in the US.
If anything, what is happening in the US is exactly the opposite: Trump, who won the popular vote, therefore a representative of the oppressed majority, is waging a war against their oppression (as masses seems it) by the authoritarian deep state.
If I go to any American factory right now and ask random blue-collar workers how they feel about, for example, public NASA's commitment to "unity, diversity and inclusion in workforce recruitment, hiring, training and management", what will be their average position on this question?
So if we try to be fair with terms, here it is quite obvious on which side we have an authoritarian institution, whose views are shared only by a narrow group of the elite and those sections of the population that receive money or are otherwise influenced by the authoritarian government, and which side is fighting against those authoritarianism