If only we had a uniter, we need a great uniter! This is just hopelessly naive understanding of the current problems.
If by uniter you mean a republican in sheep's clothing, a democrat president (which looks like a long-term trend) that just does whatever republicans went then yes, that would work. That president would "unite"
The bottom line is that you're having intense polarization as a reaction to an increasingly insane extremist sliver of a right wing base.
http://nymag.com/daily/intelligencer...migration.html
How can you be a "uniter" while looking at the graph below.