I believe it's more a matter of perception of the Democrats refusing to compromise than it is about a wall. Sure, there are some Republicans that hold the wall

I believe it's more a matter of perception of the Democrats refusing to compromise than it is about a wall. Sure, there are some Republicans that hold the wall as an important single issue, but the vast majority of single-issue voters that I know don't set their allegiances based on that particular one. From where I sit, this is a matter of the Democrats preferring to put the brakes on everything rather than give on this one, individual issue. Further, I don't think that the majority of Democrat legislators are opposed to "the wall" at base - they're opposed to Trump and his policies in general. It's a game of chicken, as others have said. Whichever side gives in cannot expect to get their way on anything for the next two years at the very least.