a) I'm sure that the people at Goldman (and most of their corporate brethren) will continue to do what they have always done, which is support both sides, that way - either way, it's a WIN for them. That, BTW is the way 'corporations as institutions' "think". As such they have mostly been a wash except in obvious vested interest stuff like say gun manufacturers and gun laws. In terms of corporate money I don't think the effect will be as huge as it's been for those who have seemingly unlimited sums to spend on a personal (and hence, unaccountable) level. It's been pretty much a loose affiliation of millionaires and billionaires with either political/cultural axes to grind, or a hugely vested interest financial-wise, or both.
b) Citizens United is - among some pretty outstanding legal gymnastics combined with total bonehead thinking that produced decisions like Dredd Scott and Korematsu - pretty close to the worst SCOTUS decision ever. Ever. Not only in the issue of 'person-hood' (gee corporations have 'person-hood', they are about to give it to fetuses and zygotes, and I'm sure that 'potential person-hood' will be conferred upon eggs and sperm, and 'virtual person-hood' on internet stuff. Why hell, just about the only persons who won't be 'persons' under the law anymore will be adult human beings) but also regarding transparency - ie. just who is giving this money out. So far we know, but that's because it's new and they are not used to it yet. The Fosters and Sheldons of the future will not be nearly as clumsy and as obvious. Those two need a "Yakkaty Sax" soundtrack, but the next bunch you will never see.
Now I don't get to see much of this, as we're not having an election out here really. Really. Unless you turn on national news you'd never know there was a big election coming up in Cali. No big ballot stuff yet. DiFi is up for re-election and I don't even think that less than one year away the 'Pubs have even found anyone to run against her. (She's never lost a single election in her career, no one ever wants to run against her.) So I haven't seen the barrage of ad's that CU is ginning up in states that 'currently matter' (Iowa matters for a few hours, one night, every four years - and at that they couldn't count this year) in this clown-car primary the Republican Party is treating us to.
Then again. Look at what $10 million buys you. Newt Gringrich? Really? Ten fricking million dollars and all you get is some short and squat little replica of the Pillsbury Doughboy who's a serial adulterer and on a personal level easily one of the most unlikable people ever, and who's current wife looks like Stepford model 0001, and has a background oozing with corruption, slime and backhanded deals.
You used to be able to buy a lot better quality politician for $10 mil.