President Muhammadu Buhari has withheld his assent to the Electoral Act Amendment Bill, which seeks to re-order the sequence of polls in 2019.
In a letter written to both chambers of the National Assembly dated March 8, 2018, Buhari said the amendments by the lawmakers were in conflict with existing laws.
President of the Senate, Bukola Saraki, read the letter on the floor of the upper chamber on Tuesday.
At the House of Representatives, the Speaker, Yakubu Dogara, read the letter to lawmakers.
A new Section 25 in the Electoral Bill, which states that the sequence of the elections will commence with National Assembly, to be followed by governorship and State Houses of Assembly, while presidential poll will come last, has polarised the All Progressives Congress Caucus in the Senate.
While the Peoples Democratic Party Caucus and some APC members loyal to the President of the Senate, Bukola Saraki, are supporting the amendment, some APC senators loyal to Buhari are against it.
Briefing journalists after the plenary, Chairman of the Senate Committee on Media and Public Affairs, Senator Aliyu Sabi-Abdullahi, said the lawmakers would decide on the step to take on the veto later.