Richard Callahan (Gov)

Richard Callahan on Friday was sworn in as the new U.S. Attorney for the Eastern District of Missouri, The St. Louis Business Journal reports. Callahan, who was nominated in September, was confirmed by the Senate Dec. 24.

He replaces Catherine Hanaway, who resigned in April 2009 to join the Ashcroft Group. Michael Reap had been the district’s acting U.S. Attorney.

Callahan has been a circuit judge in the 19th Judicial Circuit of Missouri, Division II since 2003. Prior to becoming a judge he worked in the Office of Prosecuting Attorney of Cole County, Mo., serving  first as an assistant prosecutor and then as a prosecuting attorney.

President Obama nominated U.S. Attorneys for Missouri, Montana and Iowa today.

They are:

Richard Callahan (Gov)

-Richard G. Callahan (Eastern District of Missouri): The Cole County, Mo., Circuit Court judge would replace Michael Reap, who has been acting U.S. Attorney since Catherine Hanaway resigned in April to join former Attorney General John Ashcroft’s law firm.

-Michael W. Cotter (Montana): The Helena, Mont. lawyer would succeed controversial Bush holdover Bill Mercer, who has been U.S. Attorney since 2001. Mercer was criticized for being the Justice Department’s Principal Associate Deputy Attorney General and Associate Attorney General in Washington, D.C., for almost two years, while simultaneously serving as Montana U.S. Attorney. He has also come under fire for his role in the politicized firings of U.S. Attorneys in 2006.

Nick Klinefeldt (Ahlers & Cooney)

-Nick Klinefeldt (Southern District of Iowa): The Des Moines, Iowa lawyer would replace Matthew G. Whitaker, who has served as U.S. Attorney since 2004. We reported earlier this month that the lawyer has been able to rise above the past of his father, Michael Arthur Klinefeldt, who is serving a 10-year sentence on a methamphetamine conviction.

Stephanie Rose

-Stephanie Rose (Northern District of Iowa): The Northern District of Iowa Assistant U.S. Attorney would succeed Matt Dummermuth, a Bush U.S. Attorney who never won Senate confirmation. Immigration lawyers and immigrant rights advocates have questioned Rose’s role in a controversial round-up of 300 undocumented immigrants working at a meat packing plant in Postville, Iowa last year. Sen. Tom Harkin (D-Iowa) said in May that Rose didn’t take part in the decision to prosecute the immigrant workers.

Read more about the nominees here.

Obama has now made a total of 27 U.S. Attorney nominations. The full Senate has considered 11 of those nominees and they were all confirmed by unanimous consent.