Most of these drugs are pretty much undetectable after abstaining for a few days. Big deal. Negative cannabis use surprised me a little but he probably left it behind when he picked up his ketamine binge. That said who the hell advertises their test results like this wtf?
Assuming that he actually has been tested, or that this is his test results would be a mistake, regardless of whether he is on drugs or not. The man is as pathological a liar as Trump.