Cheating? I understand it was a @%^# move but if its my job to prevent bad trades from going through don't I have the right to prevent it from happening to my own team? Everyone in my league had an issue the first week with league votes because every trade was getting vetoed so they told me to change it to commissioner review.
No excuse. You need to reverse that veto immediately. What if someone else in the league makes a bad trade and asks you to veto it after it's been accepted? You're setting a bad precedence here. It's your job as commish to set the example for others, not take advantage of what you see as a loophole. Show your league that your a mature, reasonable commissioner-- reverse the veto and accept the consequences.