Bolstered by the backing of key watchdog groups, top GOP oversight official Rep. Darrell Issa is pressing House oversight committee Chairman Edolphus Towns to help investigate a mounting number of technology-related ethics problems for a White House that has prided itself on both transparency and its technological savvy. Issa’s latest move is a June 30 letter to Towns requesting the chairman join Issa in “launching a formal investigation” into numerous allegations the Obama White House has played fast and loose with its ethics rules and disclosure requirements under federal law.