No; the MU is the timeline in which "Requiem for a Martian" was an actual script, that got produced and aired (thereby destroying the credibility of ST, prolonging the Vietnam war, causing NASA to be taken over by the military, causing Roe v. Wade to go the other way, and generally giving us what Trump tried to give us: the mercantilist, social-Darwinist, unabashedly racist, sexist, and jingoist America that would have been, had Theodore Roosevelt taken the bullet that was meant for McKinley), and not a hoax dreamed up decades later by a few wise-asses.
We're definitely the MU. In the prime universe, President Trump was probably a selfless philanthropist who donated all the money he inherited to charity and then took a political risk to demand the end to the sanctuary districts.