A relatively powerless Congress got brownie points for taking the initiative knowing the outcome in advanced. They can crow about being beat up for doing the right thing Peoliticians lacking power are piteous beings
The law aside (of course this is ridiculous and wrong) it seems like one of the presidents normal gambits - tell them not to look at something, he wants them to hype and finally see - with the democrats looking like fools in the end and president Trump being right again.
President Trump in the past has enjoyed talking about how wealthy he is how he had some challenges lost it all on paper - got it back. I don't think he'd mind if it all came out and showed the ingenuity he exercised to rebuild his fortune.
But why not have both - democrats looking stupid again and exposing president Trump for the iconic business maven he has presented himself to be?
I've state here often and before the election president Trump gets his crystal ball to work so well because he does it the old fashion way he pays for intelligence and probably has for years developing his own ad-hoc intelligence service. If that's true he realizes others do the same and if push comes to shove anything can get leaked. We long past pushing and shoving.