If, as in this case, Michelle heads to fundraisers in AZ., I expect that it is funded by the DEC. However, as the secret service is required to guard the wife of the president, and in this case, has to be put up in motels etc,which pays those bills, the DEC or the government? Use any example you want. I only used Ms. Obama as an example as it is current. Just curious...I'm sure there is a system for payment, just don't know what.