Darrell Issa -- the chief thorn in the side of the Obama administration -- could soon be relegated to the back bench. As the top House watchdog for nearly four years, the California Republican has dragged administration officials before him for hours of grueling and often embarrassing questioning. He's issued a swath of subpoenas, fueled countless controversies and spent hours excoriating the Obama White House on cable news. By all appearances, Issa has relished the job and the fame that's come with it. But his time's running out.