Probably powerful enough, but Hillary is a liberal and liberals already have a party.
But what if she were to flip the switch and become a moderate...and a reasonably conservative (with respect to fiscal responsibility) one at that?
Not only does she have the power to do so (flip), but she would take a lot of her current Democratic supporters with her.
The tough part would be getting people like me on board, but I will stand before you all and say this:
If Hillary (and Bill) were to found a new, moderate party
for the good the country, I would support the party. That doesn't mean I'd ever vote for either of them on anything, but if they weren't on the ballot, I would be ok with supporting the party they'd founded.