The oath of office envisions that a US President protect the nation, the rule of law, and the US Constitution.
Since January 2017, such basic assumptions have been stripped away.
Pretend otherwise if you wish .... but do so at your nation's peril.
Link: https://www.nytimes.com/2020/09/09/us/politics/homeland-security-russia-trump.html?action=click&module=Top%20Stories&pgtype=Homepage