Today's Boston Globe has an article on the heavy spending on Scott Brown's campaign for the US Senate in Massachussetts from executives at financial institutions:
In a six-day span just before the US Senate election, Republican Scott Brown collected nearly $450,000 from donors who work at financial companies, a sign the industry is prepared to spend heavily in the upcoming midterm elections to beat back new controls and taxes President Obama wants to impose.
...and this was before Citizens United. So, oh no, we don't have to worry about corporations running our country.