You have day to day discussions with people. At school, work, in your home, friends, family. The consensus, even among Obama voters (many of whom have buyers remorse for the second term) they all can agree that they want Obamacare gone, or they hate the IRS, or Government spending is out of control, ect ect. However, there is a sense that no matter who wins the White House or Congress...nothing changes.
Yes, I heard a lot about this supposed buyers' remorse from Obama voters that was supposed to manifest in 2012. How did that turn out again?
For what it's worth, many people simply voted for Obama over Romney because they personally liked Obama more, which trumped their view that Romney was more aligned with their views on the issues. People wanted the candidate who they felt cared about them.
So, there wasn't necessarily buyers' remorse, but it seems that there were more complex undercurrents to why Obama defeated Romney, and why the President's support has weakened after his re-election.
I think a clear majority of people agree with Democrats on economic policy like taxes, healthcare and education. I don't think it's even close. Democrats have always had an advantage there and it's not really changing except in terms of Republicans getting more doctrinaire in their beliefs.
The big divide is on social issues and social-class/race issues. Republicans basically use those issues to manipulate the lower/middle class into scapegoating people and getting worked up about nothing.
To be fair, in a lot places like rural Appalachia the Rs control the patronage machine so they can essentially buy votes.