With the showdown between top GOP oversight official Rep. Darrell Issa and Department of Homeland Security (DHS) Sec. Janet Napolitano heating up, Napolitano has dispatched a 21-man team to respond to Issa’s document and testimony requests, a DHS source says. The team includes 15 lawyers and six “support staff” who have logged over 600 hours working to find documents and review them before sending more than 3,000 pages to Issa, the source says.(Snip) Tuesday, Issa subpoenaed the testimony of two key career officials at DHS, the first time Issa is using the force of law to compel information from the