President Donald Trump’s official super PAC, America First Action, recently unveiled its first independent expenditures in the 2020 presidential election attacking presumptive Democratic nominee Joe Biden on his response to the coronavirus pandemic.

But critical information about financial dealings of Trump’s re-election campaign remains hidden by shell companies, obscuring details critical to determine if Trump’s campaign is coordinating with his official super PAC.

Super PACs can raise and spend unlimited sums supporting a candidate so long as they do not coordinate with the candidate’s campaign on spending. The Federal Election Commission considers shared vendors when determining if communications constitute illegal coordination between a campaign and an outside group supporting it. The Trump campaign’s disclosure of payments through shell companies keeps the identities of sub-vendors it might share with its super PAC hidden.