The Clinton campaign says as soon as they receive an invoice, they'll pay the Des Moines Police Department for the services they provided at the Katy Perry concert last October. City Hall provided us a copy of the invoice that has already been sent. The invoice is dated November 19, 2015. The bill is nearly $1,800. The Marshalltown Police Department is dealing with the same problem. "We have requested reimbursement from the Clinton campaign. We haven`t received that payment yet," said Marshalltown Police Chief Michael Tupper. . . "In my 23 year career, the Trump campaign actually paying this large...