Raleigh, NC (CNN) - Fewer staffers and campaign aides of 2008 Democratic presidential candidate John Edwards are being summoned to appear in person before a grand jury in Raleigh, possibly indicating a final phase of prosecutors' efforts in the case, multiple sources tell CNN.
The grand jury, which meets in secret, was expected to reconvene Wednesday. It has been meeting as prosecutors work to prove whether or not Edwards illegally used campaign funds to cover up an affair with a campaign videographer, Rielle Hunter.
A source close to Edwards' 2008 president campaign confirms that a coworker was set to testify in person Wednesday, March 2nd, but will now be interviewed from home.
Those close to the campaign are analyzing the move as a sign the grand jury is winding down, and that Edwards might avoid indictment.
"It's very polarizing," says a source that was also subpoenaed by the grand jury and was later told an interview would suffice. "A lot of people think there is nothing there, and a lot of people think, after all this, there must be something really big there. Either way, people are going to be surprised."
John Edwards acknowledged the federal probe in May 2009. The nearly two-year investigation has involved former Edwards staff members and wealthy campaign donors who were interviewed by the FBI and the US Attorney's Office.
"A U.S. attorney get can get anyone indicted on anything if he wants," says a source who asked not to be identified. "The question is, is it worth doing."
George Holding, the U.S. Attorney for the Eastern District of North Carolina, is responsible for overseeing the federal probe. Holding is a Bush appointee who stayed beyond his term at the urging of Democratic Senator Kay Hagan in an effort to avoid being seen as obstructing justice.
John Edwards' last public appearance was at the funeral for his wife, Elizabeth Edwards, who passed away last December after a six-year battle with cancer.
In addition to a possible indictment, Edwards is involved in another legal battle. Rielle Hunter, his former mistress and the mother of his youngest child, is suing Andrew Young to reclaim materials that she says belong to her, including an alleged sex tape that involves Edwards. Edwards was deposed in that case last month.
Young was a senior aide to Edwards who originally claimed that Hunter's child was his own in an effort to shield Edwards from having to make the disclosure.