I can see arguments for "it's all Trump", "it's mostly Trump", and "the difference in 'fault' isn't meaningfully large", but I can't see an argument for "it's all/mostly Democrats". Can you elaborate?
I am, too, but I would say the easiest argument to make for that case is that he eventually came around to offering them things they wanted, and a reduction of what he wanted. But, Pelosi and others simply hate him so much that they are willing to flip their position on the wall issue 180 degrees from where they were just a few years ago in order to spite him. Both sides need to be willing to compromise.
Edit: I'm not being snide, I'm actually ignorant.