Johnson returned to Liberia in March 2004, following the resignation of Taylor as president and the installation of a transitional government. He stated his intention to return to politics, though he briefly left Liberia again on 7 April due to death threats he had received from the Liberians United for Reconciliation and Democracy (LURD) rebel group. In the 2005 general elections, Johnson contested and won a Senate seat representing Nimba County. For a period he served as the chair of the Senate's defence committee.