Their problem is two-fold:
1. They can't make any public statements about it because there's a big difference between "seeing them" and "seeing them in a way that we can say so."
2. There's absolutely no information of any kind in those tax returns that would incriminate Trump in any way. That's why the Democrats don't actually WANT the tax returns to be made public. As long as they are not public, the Democrats can make sh!t up about what "might" be in them.
I think the RATs know there's nothing amiss in Trump's returns, since the IRS has been already been examining them with microscopic obsession for decades.
But, RAT voters are too stupid and lethargic and lazy and stoned on smoking weed to know the difference.
RAT politicians sure know their audience.