Politico: Could the Trump VP Vetting Process Go Off the Rails?
The questionnaires can fill more than 100 pages, supplemented by tax returns and other documentation, according to Trevor Potter, who was general counsel to McCain's 2000 and 2008 campaigns. The lawyers follow up with emails and interviews.
"The secrets that get revealed on a vet report that are not in the public record usually stay secret," Potter said. "If it can be found on public records, it will be."