Matea Gold for WaPo:

A Democratic legal watchdog group has filed a new Federal Election Commission complaint against 11 GOP presidential candidates, the Republican National Committee and several groups in the Koch political network, saying their participation in a data-sharing arrangement violates coordination rules.

In a complaint sent to the commission last week, the American Democracy Legal Fund seized on a new deal between Data Trust, which has an exclusive list-exchange agreement with the RNC, and  i360, a company that manages its own database for groups in the Koch network and other political clients.