Nigeria President Muhammadu Buhari’s party has been hit by a second wave of defections in one day.

It has been announced that 38 members of the house of representatives have left the All Progressives Congress. This news comes after 15 senators in the upper house of Nigeria’s parliament, the Senate, had made a similar move.

This means that in the Senate the main opposition People’s Democratic Party now has a majority.

In the 109-member house, the PDP has 58 senators, the APC has 48 senators and representatives from three other opposition parties hold the remaining seats.

Fifteen senators quit Nigerian President Muhammadu Buhari’s ruling party on Tuesday and the country’s third most senior politician said he might follow suit, in a sign of growing rifts in the former military ruler’s restive political camp.

Fourteen of the 15 lawmakers left the All Progressives Congress (APC) to join the opposition People’s Democratic Party (PDP), a letter read on the Senate floor stated. Another senator later left the ruling party while parliament was in session.

Senate President Bukola Saraki, the number three political leader in Africa’s biggest economy, told Reuters in an interview a few hours later that the chances of him also leaving the APC were “very, very high”.

The defections, and the suggestion that there may be more to come, have taken place just weeks after a faction within the party said it no longer backed Buhari.