“OK, can someone please explain to me this obsession with Trump’s tax returns?”
It is an attempt to provide more angles of attack on Trump.
They are trying to turn the $130,000 he paid to Stormy Daniels into an illegal campaign contribution. etc.
They are looking to see if Trump deducted it as a campaign or a business expense. Either would be improper as the payment is a personal expense. I am certain that his accountants made sure it does not show up in either category.