Why was this attorney fired?

Sometimes a really big story is sitting there, right in plain sight. That's the case with the firing of San Diego US Attorney Carol Lam and the on-going Duke Cunningham investigation.

As per Washington conventional wisdom we're now supposed to accept that the firing of seven US attorneys around the country was, yes, perhaps unprecedented, but more an example of Bush cronyism than an effort to short-circuit one or more investigations. But the firing of Lam just doesn't bear out that reading.

Earlier this month, Lam indicted Brent Wilkes, Dusty Foggo and John T. Michael.