Nothing good comes from working with the Dems.
First, that's just "political" speak to convey the impression he is WILLING to work with the other side...people like that, for the most part.
Second, it is absolutely in our interest to try and peel away the few conservative Dems remaining in congress...on some key votes. This can not only foster disunity and disruption on the Dem side, it can help us to pass some important legislation. It is a VERY difficult task, as Pelosi/Schumer have done an effective job of locking down any "wannabe" blue dogs thus far...but each little success Trump has makes it tougher for Pelosi/Schumer to maintain that lockdown.