shifting to the right instead of listening to the massive calls for more progressive policies

My thought is that the center-right Democrats that hold power in the federal government saw what happened to the center-right Republicans when MAGA took over, the centrist lost power to the more right leaning politicians. If the centrist Democrats do the same they will lose power as well. So their strategy has been to ignore and undermine the more left leaning policies and candidates so they can stay in power longer.