GOP Files Ethics Complaint on McCaskill They want investigation into use of tax money for flight By Matt Cantor, Newser User Posted Mar 15, 2011 2:45 PM CDT 42 comments Comments In this April 27, 2010, file photo, Sen. Claire McCaskill, D-Mo., listens during a hearing on Capitol Hill in Washington. (AP Photo/Charles Dharapak) (Newser) – Democratic Sen. Claire McCaskill is the target of a GOP-filed ethics complaint over her personal plane, Politico reports. McCaskill has acknowledged that she mistakenly used taxpayer money to cover the cost of one purely political trip last year, and she reimbursed the Treasury Department for it last week. Today, Missouri Republicans asked the Senate Ethics Committee to open an investigation. “Sen. McCaskill was beyond embarrassed and acknowledged the mistake right away," said a spokesperson in response to the GOP action. "If the situation had not already been fixed, we would fix it again." The state's party chief said McCaskill should know better: “The rule is pretty clear," he said. "There is a way you can use a private aircraft."