Question: What American road racing cyclist lost to  Jens Voigt for the second year in a row?

Context paragraphs:
Alberto Fernández (cyclist): Alberto Fernández Blanco (15 January 1955 - 14 December 1984) was a Spanish road racing cyclist.  His son Alberto Fernández Sainz is also a road racing cyclist.

Ralf Grabsch: Ralf Grabsch (born 7 April 1973 in Wittenberg) is a former German road racing cyclist.  He is the older brother of fellow road racing cyclist Bert Grabsch.

Levi Leipheimer: Levi Leipheimer (born October 24, 1973) is an American former professional road racing cyclist.  He was twice US national champion, winning the time trial title in 1999 and the road race in 2007, and is an Olympic medalist.  Leipheimer was born and raised in Butte, Montana and resides in Santa Rosa, California.  He is the patron of the widely attended King Ridge GranFondo, a mass participation ride in Sonoma County.

Tom Barras: Tom Barras (born 21 June 1978 in Keighley, West Yorkshire) is an English former professional road racing cyclist.  He has taken more than 100 race wins during his career.  Barras is also the son of former professional racing cyclist, Sid Barras.  After graduating from Loughborough University in 2000, Tom started his professional career in Belgium, before returning to the UK in 2006.  He combined his racing with work as a web designer from 2007.  Barras was ranked 13th in the UK national road rankings at the end of the 2007 racing season.  In December 2014 he was announced as a member of the NFTO squad for 2015.  Barras retired from racing at the end of the 2015 season, but remained with NFTO as a directeur sportif.

Jostein Wilmann: Jostein Wilmann (born July 15, 1953) is a former Norwegian professional road racing cyclist.  His best performance came in the Tour de France of 1980, where he finished 14th overall.  This is still the best result any Norwegian cyclist has achieved in the Tour de France general classification.  He is also the only Norwegian cyclist to win the Tour de Romandie and the Setmana Catalana de Ciclisme, taking victories in both in 1982.  He is the father of racing cyclist Frederik Wilmann.

Aleksandra Koliaseva: Aleksandra Koliaseva (born 18 August 1968 in the Soviet Union) is a former Soviet Union and Russian road racing cyclist.  She won a gold medal at the UCI Road World Championships in the team time trial in 1993 and 1994 and a bronze medal in 1992.  In 1995 she became Russian national champion in the road race and in 1996 she won the Tour de l'Aude.  She is the mother of racing cyclist Pavel Sivakov.

2007 Deutschland Tour: The 31st edition of the Deutschland Tour cycle race took place in Germany from August 10 to August 18, 2007.  It did not start with the traditional prologue but with a normal stage.  The race included a team time trial, an individual time trial and seven stages, covering a total of 1292.5 km .  The race began in Saarbrücken and finished in Hanover.  For the second year in a row Jens Voigt held off Levi Leipheimer to take the victory.

Jorge Rios: Jorge Rios (born July 7, 1972 in Paços de Ferreira, Portugal) was a professional road racing cyclist from 1992 to 2010, where he decided to end his career as a professional road racing cyclist.  Is known to have obtained 46 Mountain Jerseys in his career.

Cândido Barbosa: Cândido Joaquim Venda Moreira Barbosa (born December 31, 1974 in Rebordosa, Portugal) is a former professional road racing cyclist from 1995 to 2010, where he decided to end his career as a professional road racing cyclist due to a serious injury on both of his knees.

Romain Feillu: Romain Feillu (born 16 April 1984 in Châteaudun, Eure-et-Loir) is a French road racing cyclist who rides for UCI Professional Continental team .  He is the older brother of Brice Feillu, who is also a road racing cyclist.

Supporting paragraphs: 2007 Deutschland Tour Levi Leipheimer
Answer: Levi Leipheimer