I don't think that the key is to be liberal. The key is to have vision and goals.
But if the vision is to appeal to more voters and the goal is to gain power - or at least to blunt the opposition's power, that's pretty weak. Good riddance, Terry McAuliffe.
Regarding abortion, I think the Democrats should take strong actions to reduce the *need* for abortions. And to ridicule the Republicans for trying to criminalize it. If done right, the Democrats are then the party of positive action, and the Republicans are just finger waggers. It's time to belly up and take a stand. Avoiding the topic for fear of offending somebody is just stupid.