Another Obama administration nominee has tax troubles. This time, it’s Ron Kirk, the president’s choice to be U.S. trade representative.

Kirk owes an estimated $10,000 in back taxes from earlier in the decade and has agreed to pay them, the Senate Finance Committee said Monday. The committee said the taxes arise from Kirk’s handling of speaking fees he donated to a scholarship fund that he set up at his alma mater, and for his deduction of the full cost of season tickets to the Dallas Mavericks professional basketball team.

The former Dallas mayor is the fourth nominee by President Barack Obama to run into tax problems.