Melgen has an outstanding IRS lien of $11.1 million for taxes owed from 2006 to 2009, according to records filed with the Palm Beach County recorder’s office. A previous IRS lien for $6.2 million was released in 2011. Despite those financial problems, Melgen and his family have contributed at least $357,000 to candidates and committees since 1998, according to Florida and federal campaign records. Of that, the Melgens have contributed about 9 percent to Menendez’s federal campaigns. Melgen also owns a private CL-600 Challenger plane through one of his West Palm Beach-based companies, and frequently flies between South Florida and Casa de Campo in the Dominican Republic, where he is from.