No, I think undecided or apathetic voters who are not currently engaged in voting will be motivated by the Dems actually doing something before the election and seeing the GOP obstruct it. More motivated than by Dems saying they will do something in the future, which they constantly fail to do.
Just fucking do something.
I speak from experience as an unaffiliated voter who votes against Republicans, but isn’t really voting for Dems because I think they will do anything. Just because it is the best chance to make the GOP lose.