It’s so blatantly bullshit that it even makes Wikipedia sound stupid:

The Supreme Court’s ruling in favor of Citizens United sparked significant controversy, with some viewing it as a defense of American principles of free speech and a safeguard against government overreach, and others criticizing it for reaffirming the longstanding principle of corporate personhood,and for allowing large corporations to wield disproportionate political power by allowing them to spend unlimited amounts of money to support their chosen political candidates, provided the corporations were technically independent of the campaigns.

Ah yes, what a great “safeguard against government overreach,” to give corporations unlimited power. You can’t overreach if you don’t really exist!