U.S. Senator Bob Menendez denied new bribery allegations involving a Qatar investment deal during a speech on the Senate floor on Tuesday, according to NBC News and multiple other reports. A federal grand jury issued a superseding indictment last week, accusing the Democratic senator of helping a New Jersey developer secure a multi-million dollar investment from a company linked to Qatar in exchange for bribes. In a speech that lasted nearly 20 minutes, the 70-year-old denied the allegations and said that federal prosecutors are engaging in a “persecution,” NBC reported. The indictment accuses…