I said it yesterday that the result of his actions here would be these sorts of statements.
I also said the dems had no intention of doing any deal that would reflect well on him prior to the election and I still think that is 110% true.
The difference is Nancy and Chuck are career politicians and know that optics are important so they'll play their game and pretend to be working on things they have every intention of poison pilling or finding a reason not to pass.
Trump is relying on his own experience of boardroom negotiations, out of the public eye, where absolutist positions can work at times. He is handing the dems leverage by losing the optics battle on this one and would be better served to play along with their bullshit in this case, as he can't simply make a statement that he's done working with a year and a half until the next election.
He has now painted himself into a corner on this issue. He'll have to buckle to work on anything, as the dems will not stop their bullshit, in which case the dems win, or he'll have to follow through and do nothing, in which case the dems win. The sooner he walks this back the better for him and if he doesn't he's going to hand them a tool for the campaign season. He needs to be more strategic with these people, as he played right into their hands this time....