Once the Tax returns are revealed with all the line items from the Russians, fine, but the can of worms will remain open long after Trump leaves office...
You guys want this to be legal precedent, live with it. There's an old saying; "be careful what you wish for." Eventually this will be far reaching and there goes some of our right to privacy. Some of you sure think it's a good idea to have the government more involved in our lives.
You've received ample comment to this, and I might only add little to it.
First, the President -- and many government officials elected, appointed or merely just hired -- have less "rights" than others. The President is supposedly subject to Congressional oversight.
Second, tax returns are -- paradoxically -- public records, but by law only Congress has the right to solicit and review them in addition to IRS processes of audit.
Third, since there is already evidence that Trump attempted to subvert the usual IRS audit of presidential returns -- and is seemingly protected by Mnuchin and the IRS Commissioner deferring to presidential as opposed to Constitutional loyalties, Congress is the only remaining fallback to assure that Trump paid what he owed as opposed to what he himself described as "as little as possible".
Since GOP administrations beginning with Bush 43 understaffed the IRS to the point of being unable to complete the normally reasonable random computer sampling of returns chosen for audit, what is to stop others from more boldly cheating on their taxes in the future, if the Chief Executive is no longer under scrutiny himself and refuses to honor the tradition of tax-return disclosure by presidents?
I suggest that you cannot maintain an orderly nation-state with any stability if citizens no longer honor their obligations to it. You can change tax laws. You can create -- through the legislature -- credits or new obligations.
But if you completely subvert the administration of those laws and encourage people to ignore their obligations, we might as well dissolve the Union and allow individual states to attempt being the only taxing authority.
Rule of Law. This is all about Rule of Law, and the authorities of different branches of government.
If Trump is allowed to get away with any major aspect of his criminality, there won't be any "Great Again."