Bilateral cooperation between Democrats and Republicans hasnt been exactly successful if you want to call it that. It's been recorded in history.
It's difficult to get any laws passed with 'unified' Democrats and Republicans. They disagree on just about everything. In my rural area mayors usually don't say they are either Democrat or Republican, they just run for office and it's decided by a simple majority vote. The bigger races such as for sheriff, or for state representative will have people deciding which party they are.
Oh, you will. It is all a dream and since matter cannot be created nor destroyed, the dreams must be real in all their myriad forms. -Beowulf
This Delicate Thing God Has Made
The world is measured in peasants; smaller than a unicorn but, bigger than a tidbit!