What Reid is doing is brilliant. What a many good parents and all good lawyers do. He knows his accusation is true. He going to get Romney to back himself into a corner, with a firm, unequivocal answer. He is going to get Romney to lie, or to release. If Romney lies, Reid has gotten Romney to doubly damned himself. If not Romney simply releases. It’s a win-win or a win situation.
Now it’s about timing. Can’t do it too soon or the Republicans will have time to regroup. Too late and it won’t have time to be proved beyond a reasonable doubt. Again Reid has the advantage, knowing his source is willing to come forward. His source can just come forward at the optimum moment, claiming that he could just no longer live with keeping the information secret.