I’m not a constitutional law expert, but here’s the argument
Hasen acknowledges that the tax-return maneuver is more of a “gambit” than a surefire strategy. “The Supreme Court might, if faced with the issue, hold that state legislators cannot require tax returns of presidential candidates even given state legislatures’ much greater power over presidential elections,” he wrote. He also warned that Republican legislators would almost certainly retaliate in state legislatures…
