There are the issues of “shared values” (which are important when it comes to raising children and imparting your values on them) and with barking moonbat leftwingnuts, you have basic facts that they are unwilling to accept (Bush did not “cheat”, 9-11 was not an inside job, Reagan was not an “evil cowboy”...).
Difference of opinion at the polls is one thing, celebrating abortion as a sacrament, fearing the “global warming” scare unless you put your plastic bottles in the right compartment of the day’s garbage bin, etc... Who can endure 50 years of that in your household?
The funny thing about this is the fact that Cass Sunstein’s wife (Samantha Power) is a very visible example of the kind of crazy that the democrats have become.
Sunstein himself is an insidious manipulator who has written extensively on how to manipulate Americans and herd them like cattle.