Perak Menteri Besar and BERSATU chief,
Ahmad Faizal Azumu has said that Perikatan Nasional (PN) will field a candidate from UMNO to defend the Slim state seat in the by-election. Barisan Nasional (BN) secretary-general
Annuar Musa said UMNO will pick the candidate for the Slim by-election, in which BN with
Muafakat Nasional (MN)'s UMNO-PAS and BERSATU together will set up a joined committee named Muafakat Nasional 'Plus'. BN has named acting Tanjung Malim UMNO chief
Mohd Zaidi Aziz, 43, as its candidate for the Slim state by-election.
Pakatan Harapan (PH) secretariat secretary
Saifuddin Nasution Ismail had confirmed that PH will not be contesting the by-election for the Slim state seat. PH is to make way to former BERSATU chairman Dr
Mahathir Mohamad’s faction to contest instead. Ahead of the by-election, Dr Mahathir has announces the formation by the initially dubbed "BERSATU Blackout" faction's new party,
Parti Pejuang Tanah Air (Pejuang) or the Fighters of the Nation Party. The yet-to-be registered Pejuang party has also names
Syariah lawyer, Amir Khusyairi Mohamad Tanusi, 38, as their candidate with PH endorsement for the Slim poll, who will be contesting as an
Independent. On nomination day, BN's Mohd Zaidi and Pejuang's Amir Khusyairi (tree symbol) along with another independent, former teacher Santharasekaran
a/l Subramaniam (book symbol), 44, filed their nomination papers to set for a three-cornered fight in the by-election. There were also two other individuals who turned up that morning but didn't submit their nomination papers as independent candidates due to personal technical reasons. ==Controversies and issues==