Right.
I sometimes question if those who think that their elected representatives are either "not doing enough" (Democrats) or the "wrong thing" have contacted them to voice their opinion? If not, that might suggest an option made available to them by Amendment 1:
“Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.” -- Amendment 1
Older community members may recall that a little over a decade ago, when a state senator refused to meet with representatives of the environmental community, I began a hunger strike to place pressure upon him. High school classes began writing to the senator, saying his refusal to meet us went against what they were learning about representative government in their social studies classes.
In time, state-wide environmentals met at the state capital. There were over 1,200 there when I spoke. Within half an hour, I met the senator, after his staff informed him I was making him look bad. Ten minutes later, we met as a group.
I cannot say that all 1,200+ were registered Democrats. But as a Democrat myself, that is my answer to questions about "where are the Democrats?" The grass roots needs to step up.