One of the key questions waiting to be answered in the Sanford saga is who paid for this week's trip to Argentina. It has also been reported that Gov. Mark Sanford's (R-S.C.) traveled to the country last June on the state's dime. His office just put out a statement defending the travel as "entirely professional and appropriate" and to benefit the state, but acknowledged that while there, he did meet with his mistress.

Here's a statement from his office:

"As noted by the Department of Commerce, I attended a trade mission with the Department of Commerce last June. As the agenda notes, the mission was spent meeting with government and private business officials in both Brazil and Argentina. This trip was handled very professionally by the Department of Commerce, and I'm proud of their work there.

"However, while the purpose of this trip was an entirely professional and appropriate business development trip, I made a mistake while I was there in meeting with the woman who I was unfaithful to my wife with. That has raised some very legitimate concerns and questions, and as such I am going to reimburse the state for the full cost of the Argentina leg of this trip," Gov. Sanford said.