There was already too much political divisiveness in USA, and now Trump is making things worse. He acts like liberal Americans are the enemy.

"Donald Trump has repeatedly vowed to unite the nation, pledging in his inaugural addresses and throughout his campaigns that it is "time for us to come together as one united people". However, the reality of his political approach is complex, and he remains a highly polarizing figure"

https://www.pbs.org/newshour/politics/trump-vows-unify-deeply-divided-nation