Dianne Feinstein's daughter holds power of attorney over ailing senator amid family finance fight

The daughter of Sen. Dianne Feinstein, D-Calif., has been given power of attorney over the sitting senator and is handling the 90-year-old's legal affairs.

Katherine Feinstein, 66, has filed two lawsuits on her mother's behalf in an effort to gain access to the estate of the senator's late husband. The senator's decision to delegate management of her affairs comes as Democrats and Republicans on Capitol Hill argue whether Feinstein is no longer fit for office.

Katherine's first lawsuit on her mother's behalf relates to a California beach house owned by the senator's...