Your comment is exactly why we are in the situation we are in now.
A ruling under an activist conservative supreme court that Obama opposed. One of Hillary's main credentials for a supreme court pick was that they'd vote to overturn Citizens United. It was a 5-4 court and Scalia had died. Citizens United decided 5-4. But America or at least the electoral college picked trump instead. So we got corruption pretending to be free speech and abortion bans instead.
Democrats could have picked a better candidate to fight Trump but they didn't.
When everyone is yelling "don't let side Y do Z because that will allow W."
This is why. It's a logical fallacy until you're talking to a person who's argument didn't ever change.
I'm sorry, but WTF? What the hell did Obama have to do with that ruling, other than serving as a convenient scapegoat in your story? It was a Supreme Court ruling, and last I checked there was still a separation of powers between the Judicial and Executive. Obama publicly called it a devastating outcome.
Obama appointed 1 of the 4 Democrats who voted in the minority, his only appointee up to that point https://en.wikipedia.org/wiki/Barack_Obama_Supreme_Court_can...
So he literally did all he could, subject to the constitution, to prevent this ruling. The logic of mentioning Citizen's United here is like people complaining that abortion rights were taken away during Biden's term. In other words, there is no logic other than a crude misdirect.
Not to say that actually happened. Just pointing it out.