Question: Who was appointed the seat left vacant by a former Las Vegas, Nevada politician in the United States Senate Election in Nevada 2012?
Sentence (from "United States Senate election in Nevada, 2012"): Incumbent Republican U.S. Senator Dean Heller, who was recently appointed to this seat left vacant by resigning U.S. Senator John Ensign, was narrowly elected to his first full term over Congresswoman Shelley Berkley.
Relevant evidence: Yes