The Civil War & Lincoln
Jonah Goldberg proposes federalism as means of peaceful coexistence betweeen the left and right. Trouble is, it has been tried before: Stephen Douglas. The other guy eventually won. Let's stick by Abe's "tough nut to crack."
In California, among other states, the left has long been at work on "independent state grounds" laws. In this regard, opponents of abortion are misguided in their focus on Roe v. Wade, which certainly should be overturned. Overthrowing Roe would permit state legislatures to restrict abortion, but it would leave other, liberal states with abortion rights protected. For more on "independent state grounds" see this book on democracy in California and this article by Edward Erler.
The Sage of Mt. Airy has more theoretical speculations on the meanings of federalism for the right and for the left.