Free Republic

At the nexus of two high-profile investigations roiling the nation's capital is an unlikely - and largely anonymous - figure known for fiercely safeguarding her bosses. Susan B. Ralston, 38, has worked as an assistant and side-by-side adviser to Karl Rove since 2001, helping manage his e-mail, meetings and phone calls from her perch near his office in the West Wing. That has made her an important witness in the C.I.A. leak investigation, as the special prosecutor has sought to determine whether Mr. Rove misled investigators about his contacts with reporters about Valerie Wilson, the undercover operative whose identity was...