While Democrats may be counting the days until U.S. Attorney George Holding leaves, the Republicans are urging President Barack Obama to keep him on the job.

Holding, a Republican appointee, has prosecuted a series of Democrats and his office is now investigating allegations involving former Sen. John Edwards and former Gov. Mike Easley, both Democrats, Rob Christensen reports.

"Now is not the right time for a change in leadership at the U.S Attorney's office," said state GOP chair Linda Daves. "George Holding has shown himself to be competent, fair and evenhanded in rooting out and prosecuting corruption in state government."

U.S. attorneys are political patronage appointments that usually change hands when the White House changes parties. Holding, a protege of the late Sen. Jesse Helms, got his job after Bill Clinton left office and George W. Bush came in. (Frank Whitney preceded Holding as U.S attorney under Bush. He's now a federal district judge in Charlotte.)

Democratic Sen. Kay Hagan has appointed a panel, headed by former Chief Justice Burley Mitchell, to recommend federal prosecutors for the three districts in North Carolina. Hagan will recommended her choices to Obama.

But the state Republican Party argues that Holding doesn’t just go after Democrats. They note that he also prosecuted such Republicans as former U.S. Attorney Sam Currin and former state Sen. John Carrington.

What happens to former U.S. attorneys?

The federal prosecutors in the Eastern District of North Carolina have gone onto wildly different careers after leaving office. Below, a quick roundup:

George Anderson: (1977-1980) Now a Raleigh attorney with his own practice.

Sam Currin: (1981-1987) Nominated for a federal judgeship but never confirmed. Led N.C. Republican Party from 1996 to 1999. Now serving time at a federal prison in Massachusetts for money laundering and obstruction of justice.

Margaret Currin: (1988-1993) Professor at Campbell University's law school.

Janice McKenzie Cole: (1994-2001) Ran unsuccessfully for Congress in 2002. Now runs an immigration law firm in Hertford.

Frank Whitney: (2002-2005) Now a federal judge in the Western District based in Charlotte, a lifetime appointment.

The Eastern District U.S. attorney usually has a strong political patron.

For most of the last 20 years, the federal prosecutor in Raleigh appointed by the president has been closely tied to Sen. Jesse Helms, except during Democratic administrations.

Here is a list of former U.S. attorneys and their patrons:

George Anderson: (1977-1980) Backed by Democratic Sen. Robert Morgan; appointed by President Jimmy Carter.

Sam Currin: (1981-1987) Former Helms aide. Backed by Helms; appointed by President Ronald Reagan.

Margaret Currin: (1988-1993) The wife of the previous U.S. attorney. Backed by Helms; appointed by Reagan.

Janice McKenzie Cole: (1994-2001) Backed by Democratic U.S. Rep. Eva Clayton; appointed by President Bill Clinton. (No Democratic senator at that time.)

Frank Whitney: (2002-2005) Former Helms legislative counsel. Backed by Republican lawyer Tom Ellis, Helms' longtime political strategist; appointed by President George W. Bush.

George Holding: (2005-present) Former Helms aide and Whitney's No. 2 at U.S. attorney's office. Backed by Ellis; appointed by Bush.