RALEIGH, N.C. — Federal prosecutors have completed a wide-ranging investigation into John Edwards’ political dealings and could indict the two-time presidential candidate within days, a person familiar with the matter said Wednesday.

Edwards could still strike a plea deal to avoid an indictment, said the person, who spoke on condition of anonymity because of the case’s sensitivity.

Federal investigators have been probing Edwards for more than two years. Their interest has spanned much of Edwards’ political career, looking into issues such as whether he did anything improper during his time in the U.S. Senate.

It looked into a network of organizations connected to Edwards, including nonprofit, political action committees and a so-called 527 political group.

Much of the investigation focused on money that eventually went to keep mistress Rielle Hunter in hiding along with former campaign aide Andrew Young, who claimed paternity of Hunter’s child in 2007 so that Edwards could continue his White House campaign without the affair tarnishing his reputation. Investigators have been looking at whether those funds should have been considered campaign donations since they arguably aided his presidential bid.