In this Friday, March 1, 2013 photograph, Sen. Robert Menendez, D-NJ, listens during a news conference at Newark Liberty International Airport in Newark, N.J. In the past, Sen. Robert Menendez sponsored legislation with incentives for natural gas vehicle conversions that would benefit the biggest political donor to his re-election, the same eye doctor whose private jet Menendez used for two personal trips to the Dominican Republic, an Associated Press investigation found. The disclosure reflects the latest intersection between Menendez, who is the subject of an ethics inquiry on Capitol Hill, and Florida doctor Dr. Salomon Melgen, who is involved in a federal criminal investigation. (AP Photo/Mel Evans)
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