WASHINGTON – In a spectacular fall from political prominence, former U.S. Rep. Jesse Jackson Jr. and his wife agreed Friday to plead guilty to federal charges growing out of what prosecutors said was a scheme to use $750,000 in campaign funds for lavish personal expenses, including a $43,000 gold watch and furs.

Federal prosecutors filed one charge of conspiracy against the former Chicago congressman and charged his ex-alderman wife, Sandra, with one count of filing false joint federal income tax returns for the years 2006 through 2011 that knowingly understated the income the couple received. Both agreed to plead guilty in deals with federal prosecutors.

Both face maximum penalties of several years in prison; he also faces hundreds of thousands of dollars in fines and forfeitures. But the government did not immediately release the text of its plea agreements. Such agreements almost invariably call for prosecutors to recommend sentences below the maximum.