Question:  Karen S. Evans served as the "de facto" chief information officer for the United States until the office was created by an American politician who served in the U.S. Senate representing what state?
Sentence (from "Barack Obama"): Barack Hussein Obama II ( ; born August 4, 1961) is an American politician who served as the 44th President of the United States from 2009 to 2017.
Relevant evidence: Yes