[PAR] [TLE] John Ensign [SEP] John Eric Ensign (born March 25, 1958) is an American veterinarian and former politician based in Las Vegas, Nevada.  He was a Congressman and United States Senator from Nevada, serving in the latter seat from January 2001 until May 2011.  He resigned amid a Senate Ethics Committee investigation. [PAR] [TLE] United States Senate election in Nevada, 2000 [SEP] The 2000 United States Senate election in Nevada was held on November 7, 2000.  Incumbent Democrat Richard Bryan decided to retire, instead of seeking a third term.  Republican nominee John Ensign won the open seat.
[PAR] [TLE] John Ensign [ SEP ] John Eric Ensign ( born March 25 , 1958 ) is an American veterinarian and former politician based in Las Vegas , Nevada . He was a Congressman and United States Senator from Nevada , serving in the latter seat from January 2001 until May 2011 . He resigned amid a Senate Ethics Committee investigation . [PAR] [TLE] United States Senate election in Nevada , 2000 [ SEP ] The 2000 United States Senate election in Nevada was held on November 7 , 2000 . Incumbent Democrat Richard Bryan decided to retire , instead of seeking a third term . Republican nominee John Ensign won the open seat .
The 2000 United States Senate election winner later resigned amid what investigation?
The 2000 United States Senate election winner later resigned amid what investigation ?
Senate Ethics Committee investigation
Senate Ethics Committee investigation