new jersey senator , 61 , is accused of using his influence to help wealthy donor in exchange for nearly $ 1million in campaign contributions and gifts .
according to a federal indictment unsealed this month , menendez intervened in the visa applications of three women tied to donor dr salomon melgen .
those women are believed to include a former big brother brazil contestant , ukrainian actress/model and a young woman from the dominican republic .
menendez , the chairman of the senate foreign relations committee , has pleaded not guilty to the charges .
melgen has also been charged in the indictment , as well as in a separate indictment for medicaid fraud ; he remains jailed .