with an estimated net worth of $24,512 in 2008.

Jill Biden, Ed.D., is the First Lady of the United States, a community college educator, a military mother, a grandmother, and bestselling author.

The median age at inauguration of incoming U.S. presidents is 55 years. The youngest person to become U.S. president was Theodore Roosevelt, who, at age 42, succeeded to the office after the assassination of William McKinley. The oldest person inaugurated president was Joe Biden, at age 78.