Aloysius Hogan left the Athens Republican because he spent a year setting up the freshman congressman's office and, believing that Mr. Broun overcame his biggest obstacle to re-election when he won the Republican primary earlier this month, wanted to return to the U.S. Senate, The Hill reported this morning.
Mr. Hogan previously worked for U.S. Sen. Jim Inhofe, R-Okla.
Mr. Broun came under scrutiny for his office spending habits recently. Several media outlets reported last week that Mr. Broun has already spent most of his annual budget for staff salaries and other expenses, but a spokesman has said he has plenty of money left.
It is not clear whether Mr. Hogan's departure is related to Mr. Broun's money troubles.