Politico is reporting that small business owners and vendors as a “deadbeat” with a pattern of not paying bills for months and instead using the cash for ad buys.

A pair of Ohio companies owed more than $25,000 by Clinton for staging events for her campaign are warning others in the tight-knit event production community — and anyone else who will listen — to get their cash upfront when doing business with her. Her campaign, say representatives of the two companies, has stopped returning phone calls and e-mails seeking payment of outstanding invoices. One even got no response from a certified letter.

Their cautionary tales, combined with published reports about similar difficulties faced by a New Hampshire landlord, an Iowa office cleaner and a New York caterer, highlight a less-obvious impact of Clinton’s inability to keep up with the staggering fundraising pace set by her opponent for the Democratic presidential nomination, Illinois Sen. Barack Obama.

Clinton’s campaign did not respond to recent, specific questions about its transactions with vendors. But Clinton spokesman Jay Carson pointed on Saturday to an earlier statement the campaign issued to Politico, asserting: “The campaign pays its bills regularly and in the normal course of business, and pays all of its bills.”