David Koch and Charles G Koch: the US  supreme court's Citizens United decision has enabled the industrialists  to fund conservative groups to the tune of $200m already in this  electoral cycle. Photograph: Getty
                    The corporate barbarians are through the gate of American  democracy. Not satisfied with their all-pervasive influence on our  culture, economy and legislative processes, they want more. They want it  all.
Two years ago, the United States  supreme court betrayed our Constitution and those who fought to ensure  that its protections are enjoyed equally by all persons regardless of  religion, race or gender by engaging in an unabashed power-grab on  behalf of corporate America. In its now infamous decision in the Citizens United case,  five justices declared that corporations must be treated as if they are  actual people under the Constitution when it comes to spending money to  influence our elections, allowing them for the first time to draw on  the corporate checkbook – in any amount and at any time – to run ads  explicitly for or against specific candidates.
What's next … a corporate right to vote?
Don't laugh. Just this month, the Republican National Committee filed an amicus brief in a US appeals court contending that the natural extension of the Citizens United rationale is that the century-old ban on corporate contributions directly  to candidates and political parties is similarly unconstitutional. They  want corporations to be able to sponsor candidates and parties directly  while claiming with a straight face this would not result in any sort  of corruption. And while, this month, they take no issue with  corporations being subject to the existing contribution limits, anyone  paying attention knows that eliminating such caps will be corporate  America's next prize in its brazen ambition for absolute control over  our elections.
The US Constitution has served us very well, but  when the supreme court says, for purposes of the first amendment, that  corporations are people, that writing checks from the company's bank  account is constitutionally-protected speech and that attempts by the  federal government and states to impose reasonable restrictions on  campaign ads are unconstitutional, our democracy is in grave danger. 
I am a proud sponsor of a number of bills that would respond to Citizens United  and begin to get a handle on the problem. But something more needs to  be done – something more fundamental and indisputable, something that  cannot be turned on its head by a rightwing supreme court. 
That  is why I have introduced a resolution in the Senate (introduced by  Representative Ted Deutch in the House) calling for an amendment to the  US Constitution that says simply and straightforwardly what everyone –  except five members of the United States supreme court – understands:  corporations are not people with constitutional rights equal to  flesh-and-blood human beings. Corporations are subject to regulation by  the people. Corporations may not make campaign contributions – the law  of the land for the last century – or dump unlimited sums of money into  our elections. And Congress and states have broad power to regulate all  election spending.
I did not introduce this lightly. In fact, I  have never sought to amend the Constitution before. The US Constitution  is an extraordinary document that, in my view, should not be amended  often. In light of the supreme court's Citizens United decision,  however, I see no alternative. The ruling has radically changed the  nature of our democracy. It has further tilted the balance of power  toward the rich and the powerful at a time when the wealthiest people in  this country have never had it so good. 
At a time when  corporations have more than $2tn in cash in their bank accounts, make  record-breaking profits and swarm Washington with their lobbyists 24  hours a day, seven days a week, for the highest court in the land to  suggest that there is just not enough corporate "speech" in our system  defies the bounds of reason and sanity. The ruling already has led to  plans, for example, by industrialist brothers David and Charles Koch to  steer more than $200m – potentially much more – to conservative groups  ahead of election day 2012. Karl Rove has similar designs.
Does anybody really believe that that is what American democracy is supposed to be about?
I  believe that the Citizens United decision will go down as one of the  worst in our country's history – and one that demands an amendment to  our Constitution in order to restore sovereign power to the people, as  our nation's founders intended. 
If we do not reverse it and the  culture of corporate dominance over our elections that it has  exacerbated, there will be no end to the impact that corporate interests  have on our campaigns and our democracy.

Bernie Sanders
guardian.co.uk,                                 Friday 20 January 2012