The problem is, the democrats have done a lot of these symbolic votes, on issues that majorities (55% or more) of the public support. They take down the vote, and the public doesn't notice.

Even with public support for their ideas, they are losing the messaging war against the other party. Most voters don't pay attention to candidates' voting records, and barring the unforseen the Republicans appear poised for a major victory in the House, with the senate in play as well. We are in for some bad times ahead.