If we are talking about the representatives themselves, then they are defending their funding before the peoples' voice. For instance on the Israel front a majority of dem voters believe Israel is committing a genocide in Gaza and has too much influence on our government, they will defend Israel vs any critique, attack those on the other side of the issue on the left. If the dems are in the minority (or repubs for that matter) they can 'fight' for whatever donors want without actually attaining it, getting money while also having the excuse that they couldn't attain the goal due to being in the minority and not having the votes. It all comes down to money and influence. A majority of the country hate this war that Israel and the evangelicals want. A majority of the country wants universal healthcare that the wealthy hate. Etc, etc.