The letter to Inslee, sent by the group End Citizens United, warns that super PACs founded to support a single candidate are “designed to serve as an arm of the campaign” and are frequently used to exploit gray areas in campaign finance law.
… “Often, politicians exploit loopholes in the law to find ways to coordinate with them, including sending their top political operatives to run these super PACs.”
More on Gov. Inslee’s nascent campaign for president here.