The Democrat Party has disengaged from the American conversation.
Winning both houses of congress plus the White House in 2008 seems to have radicalized the party when it comes to US politics. It seems like the period of 2008-2010 caused them to move so far to the left that they can no longer win rural voters at ALL.
In modern to be a truly mainstream party with an ability to govern, a party needs to attract rural voters, because they dictate who wins the House. They have become the party of Obama, Nancy Pelosi, Elizabeth Warren, and Steven Colbert. None of these people have any connection with rural voters. Furthermore, they almost look down with disdain at rural America as if it is something to be discarded and forgotten. They don't share their cultural beliefs or seemingly respect them anymore. Rural voters have no need for new government programs, and they are happy with religion. In response, Obama talks about bitter people clinging to guns and religion, which helps drive rural voters away.
Rural voters have power. They offer the ability to govern the US. Playing the blame game and saying the reason is gerrymandering instead of looking inwards to CHANGE and maybe find a way to connect with the rural voters will leave the democrat party forever a minor party, always in opposition as it is right now.
The democrats will not offer a ticket that will resonate with rural voters in 2016. The House has now swung FAR toward the GOP. Its at 247 republicans and 188 democrats. That is the largest GOP majority since before FDR and the 1929 crash. You cannot explain that away simply by gerrymandering.
But how can they move to the right at this point? They almost seem to have gone too far. Any attempt to win rural voters will be met with calls that it is going backwards by the democrat base. And if they DON'T move to the right, they are OUT of the national conversation and can never govern again.
Its like the democrats are trying to govern Europe when they live in America. They are two different places with two different cultural beliefs. This is why the GOP holds both houses and is very unlikely to ever give them up.