Here is a Pew Research Center poll which shows what we've been feeling is correct (as it often is, he added egotistically). As the Los Angeles Times reports, Pew finds Americans are becoming more polarized, the left farther left and the right farther right.
Democrats are more pro-immigration, pro-ecology, and pro-social safety net than Republicans, and the differences are not trivial. The opinions of each party's adherents about the appropriate role of government have moved in opposite directions, too. It's a good article, very worth your time.
In addition to "moving" our opinions, I believe demographers find we are physically moving to states where people agree with our views, too. That is certainly true of the DrsC, who relocated from very blue California to very red Wyoming a decade ago. We moved with a one year detour to Texas, another very red state.
