South Carolina Gov. Mark Sanford (R) disappeared once again without informing the state's lieutenant governor, the Associated Press reports.

Sanford spent Father's Day weekend with his sons, but dropped off the radar Monday without notifying Lt. Gov. Andre Bauer (R), with whom Sanford has a less-than-stellar relationship.

Sanford's spokesman would not tell the AP where the governor was on Monday, "except to say he's been off."