Because racism and sexism is still very prevalent in the US.
She is a minority. And she is a woman.
The news is a shit hole funded by the ultra wealthy who will benefit from Trump’s tax cuts for the ultra wealthy. Which explains the coverage.
Many voters are still racist and sexist. Which explains the polls.
You are thinking about what Trump publicly and repeatedly said he would do on his first day to anyone who voted against him or anyone who has criticized him in the past.