Cate Edwards is a 30-year-old lawyer who has sat behind the former presidential contender nearly every day of his corruption trial, now in its fourth week. She's expected to testify Tuesday.
Edwards has pleaded not guilty to six counts related to campaign finance violations over nearly $1 million from two wealthy donors used to help hide the Democrat's pregnant mistress as he sought the White House in 2008.
Cate Edwards fled the courtroom in tears earlier this month during testimony about her mother's reaction to her father's affair with Rielle Hunter. It is not clear what she knows about the cover-up that may help his defense.
Edwards faces up to 30 years in prison.