When this $2 million is added to what was already raised, it comes to a total of $10.25 million raised so far. If any Democrat is considering a run against Hillary for the nomination (which I think would be a mistake), then they'd better get busy raising some money. They are already over $10 million behind (and the super-PAC's fund-raising is not going to slow).
The Republicans might want to start worrying about this also. I doubt Hillary is going to have to spend much to get the nomination (since an overwhelming majority of Democrats support her nomination), and that means a lot of this money can be saved for the general election in 2016.
(This caricature of Hillary Clinton is by DonkeyHotey.)