So two things. One he didnt lose his clearance. His interim TS (and I still dont understand how that is a thing. Not going to expand) has been downgraded to a Secret, not clear if that is interim or has been granted.
Two, Trump is not interfering. His chief of staff put new rules in place a while back and this is the manifestation of those rules
No where was there a statement of adverse information. Rather it was just a lack of completion of the background check the way it reads. Frankly sounds like working as intended.