The reason why I don't release my tax records? Yes, it is an exceedingly stupid question.
The main reason is that I am not in a position to affect laws in this country. When you are an elected official, the public has a right to know if the decisions you are making are based purely in the public interest or is it based on what you invested in, have a stake in, etc.
Would have thought something this simple would be self-explanatory. But, I have learned never to underestimate the stupidity of trumpers.