The problem with centrism in America is two-fold. One: the GOP has become so far-right over the last few decades (which in part helped lead to Trump) and so un-willing to compromise for fear of angering their new base that a compromise with them is nearly impossible.
Second: the Democrats, for all their talk of being “on the left”, are actually more right-wing than not. Nowhere near as right as the GOP, but there’s very little that could be considered ‘traditionally left’ in their ideology. Because of this, trying to find a balance between them and the GOP is just trying to figure out what kind of right-wing government you really want.