They might also have seen that many of the biggest donations are secret, given to tax-free advocacy groups in defiance even of the admonition in Citizens United that independent contributions should be disclosed. If the justices were at all concerned about these developments, they could have used the Montana case to revisit their decision and rein in its disastrous effects. The only conclusion is that they are quite content with the way things worked out. [...] Congress can — and should — require disclosure of secret donations. The Internal Revenue Service should crack down on political organizations that pose as tax-exempt “social welfare” organizations to avoid current disclosure rules.