Lautenberg's GOP opponents: Millicent Fenwick 1982, Pete Dawkins 1988, Chuck Haytaian 1994, Doug Forrester 2002 and Dick Zimmer 2008. Ken Rudin collection hide caption

itoggle caption Ken Rudin collection

Sen. Bill Frist (left) gives a mock smallpox vaccine during a training session in 2003. Frist, a surgeon, once gave CPR to a visitor who collapsed in a Senate office building. Susan Walsh/AP hide caption

itoggle caption Susan Walsh/AP