I must be getting old.
Activism like this gets harder and harder for me; much as my brain insists that actions like are necessary, and that I shouldn't surrender to the grip of apathy, it's harder to convince my heart that stuff like this will do anything. I don't think a veto is likely; I think it's certain, unless the Dems get together and make a real push that not only gets them a 2/3rds majority with which to overrrule the veto, but can stand up to the inevitable slanders that the Republicans will hit them with about how the Dems are a bunch of baby-killin' homos and whoremongers. Yeah, it's true that assaults like these are not only ironic but positively ludicrous in light of recent events, but they still work, partly because the Dems fear them so damn much. If more prominent Democrats, like say, Hillary Clinton, were willing to be unambiguous in their support for abortion rights as a good thing, I'd have more faith, but instead they spend their time pussyfooting around and try to triangulate a "third way" that will allow them to keep their base while not looking like they like this abortion thing too much.
In the end, the Republicans aren't the real enemy of liberals; it's the Democrats.