Donald Trump declared this week that he would not release his tax returns for several months — perhaps after the November election, maybe never at all. The presumptive Republican nominee said (as he has before) that he wouldn’t release his returns until after the IRS is done auditing him, adding that he thinks the public isn’t interested in the documents. “There’s nothing to learn from them,” Trump argued.

On the contrary, Mark Alexander wrote in February. For one, Trump built his platform on the fact that he’s “really rich,” a claim that is possibly not as true as he’d like us to believe. Releasing his tax returns will clear up the question once and for all whether the TV personality is worth billions or only a few hundred million. “But while the speculation about his wealth may seem trivial to some,” Alexander writes, “what cannot be seen as trivial are the questions of who and what Donald Trump has supported with all that wealth over the last decade.” In other words, seeing where Trump has spent his wealth — how often he donated to Democrat causes and how little he’s given to veterans groups — will show where his true loyalty lies.

Trump’s refusal to release his returns is “a ticking time bomb for the GOP,” warns National Review’s John Fund. In the last election cycle, the IRS illegally leaked some of Mitt Romney’s tax information. What happens if the GOP officially makes Trump its nominee in July and then it turns out his financial dealings cast even more serious doubt on his viability as an effective leader? At this point, Hillary Clinton, who used a secret email server to skirt the Freedom of Information Act, seems more transparent. After all, she vowed to release the government’s files on UFOs and extraterrestrial life — and that’s a strategic move on her part.