Virginia Gov. Terry McAuliffe has cancelled a scheduled appearance at an early June fundraiser for former Ohio Gov. Ted Strickland amid a federal investigation into campaign donations from McAuliffe’s 2013 gubernatorial campaign.

The Virginia Democrat was set to highlight a fundraiser on June 2 in Clintonville, Ohio, for Strickland, who is running to unseat incumbent GOP Sen. Rob Portman in November. The fundraiser is hosted by former Ohio House Rep. John Patrick Carney, and is looking for donations of $250.