A major US court case could help fix the ills of Citizens United | David Sirota

A Maine lawsuit has suddenly become the most significant anti-corruption battle inside America's legal system

Slush funds of anonymous unregulated money are now the dominant institutions in American politics, converting our elections into auctions - and transforming the legislative process into a donor bidding war.

In the last election, Pacs and Super Pacs spent more money to buy federal elections than all candidate campaigns combined. One in every $5 flowing through a Super Pac came from organizations that do not disclose their donors. In all, $2bn of independent" spending was dark money, meaning the public cannot see who is buying elections - even though politicians know exactly who they owe once they are in office.

David Sirota is a Guardian US columnist and an award-winning investigative journalist. He is an editor at large at Jacobin, and the founder of the Lever. He served as Bernie Sanders' presidential campaign speechwriter