Muller said he did not discuss his lobbying activities with Melgen, even though they were both involved with GFS.Both Muller and Melgen also have fundraising ties to Menendez. Muller gave $5,000 to Menendez' New Jersey Senate re-election campaign in 2011. Melgen has been a staunch supporter, giving more than $14,000 directly to Menendez since the late 1990s and, through his eye clinic, donating $700,000 last year to a "super" political committee that supported Democratic Senate candidates. The committee, in turn, spent $582,000 to back Menendez' campaign. ___ AP Writers Erica Werner in Washington and Ezequiel Abiu Lopez in Santo Domingo contributed to this report.