protip: ad hominem attacks show intelligent people that you lost the debate.
>why would an innocent person defend himself?
he's got plenty of defense. he's got his personal lawyers, access to some of the best legal minds Washington D.C. defending him.
he's not defending himself, he is ATTACKING American Rule of Law and endangering National Security by politicizing intelligence and outright attacking and overtly undermining well meaning Law Enforcement.
Trump would never have been able to qualify for the security clearance Comey or Mueller have, ever, on his best day, had he not been elected. I feel we need to "extremely vet" any American Citizen and start investigating them for a security clearance as soon as they become a candidate.
OH FUCK.. wait.. maybe that is why Trump got investigated. Not because he did something wrong, but because he got elected, and needed a security clearance. Investigations are very detailed and the military has access to all that shit, so Mattis probably has his whole file from the second he announced his candidacy.
If it turns out that EVERYONE who runs, gets investigated, then Trump just looks panicky and paranoid and guilty when he lashes out at the very people who are also investigating Hillary Clinton at the same time. It signals he has something to hide.
>the russian investigation has been ongoing for over a year and no evidence has been found
Plenty of evidence has been found, MOST OF THE EVIDENCE HAS NOT BEEN DECLASSIFIED.
They may be sitting on a pile of nothing, or they may be sitting on lawfully acquired evidence of high crimes and misdemeanors, but at this point Trump knows he's being investigated by literally EVERYBODY, so I doubt he's doing anything bad NOW, unless he's kinda.. well, off.
So basically, if he's done nothing wrong then there should be nothing to find during the nominal DoD background check period beginning when he first declared candidacy.