My objections to the Trump presidency, like my objections to his candidacy, are not rooted in politics, but in something more fundamental: Qualifications and Experience.
Donald J. Trump seems not to have any clear political philosophy guiding him. To the extent he has any philosophy at all, it seems to be narcissistic: Trump first, second, and third. In fourth place is anyone or anything willing or able to serve his first three priorities.
This makes for a Presidency open to manipulation by a variety of bad actors. His very lack of political experience or other mitigating qualifications, combined with his lack of any sort of principled vision of governance , opens our country to attack from within and without.