Quote: That was a close ruling for the court and just one or two more liberal judges could easily overturn it.
First thing you need is one or two more liberal judges. Then, you need someone to bring another situation forward which meets the conditions of Citizens United. Then you need to go through the whole Federal District Court/Appellate Court routine before you get back to the Supreme Court.
Then you need to Supreme Court to overturn it.
That's a lengthy process.