Yes, by the laws of this country Donald Trump is legitimately our president.
By any measure other than the letter of the law, I do not accept him.
He did not receive a majority of the votes, and is not supported by a majority of the American people. He benefited from some unknown quantity of illegal foreign interference. He is supposed to defend the Constitution of the United States; he has shown repeatedly that he has no understanding of that document, much less concern for what it says. He has demonstrated a degree of cronyism and corruption unprecedented in my lifetime, before he even took office. He makes the United States less safe. He represents everything that is worst about this country, from bigotry to crass materialism, and none of what is best.
I do not accept him as my leader in any sense other than that forced upon me by law. And I will work by any legal means available to oppose the damage he is going to inflict on my nation.