Political groups that don’t fully disclose their sources of funding have already spent more than $100 million to influence 2020 races, a figure that is sure to rise as “dark money” backed super PACs unload their unprecedented cash reserves.

Dark money groups such as political nonprofits that don’t disclose their donors have spent nearly $14 million to influence 2020 races, according to Federal Election Commission filings. “Grey money” outside groups that disclose a portion of their funding — such as super PACs that take money from shell companies or political nonprofits — have spent over $89 million.

By choosing to keep their donors secret, these groups leave voters in the dark as to exactly who is funding their political activities. Under a new Trump administration regulation, the Internal Revenue Service won’t know either.

The IRS finalized a rule this week that will exempt some dark money groups from disclosing their donors to the IRS. Many of 501(c)(4) nonprofits affected by the new rule already don’t […]