Senator Ifeanyi Ubah has begun his defence at the Anambra Elections Petitions Tribunal sitting in Awka.
The Young Progressives Party (YPP) senator was elected on February 23 to represent Anambra South at the National Assembly.
His election is being contested by Andy Uba of the All Progressives Congress (APC) and his younger brother, Chris Uba of the Peoples Democratic Party (PDP).
Ubah presented eight witnesses, four for each petition on Wednesday, to testify on the validity of his victory.
Justice Thelma Okara told the defence to present all his remaining witnesses on the next adjourned date for the closing of all cases as the tribunal was constrained with time.
The matter was fixed for August 10 for the continuation of the hearing.