Datuk Seri Mukhriz Mahathir had dreams of becoming prime minister via the 'fast track' way, alleged his former special political officer, Haris Che Mat.

Haris, who is also Kedah UMNO's former executive secretary, claimed the former Kedah menteri besar had the support of his father, former prime minister Tun Dr Mahathir Mohamad, who wanted to topple Prime Minister Datuk Seri Najib Razak to pave the way for his son.

He said the plan began during the UMNO elections in 2013 when Mukhriz contested for the post of UMNO vice-president.

"I was part of the machinery for Mukhriz's campaign for the post of UMNO vice-president in 2013. Many of us thought it was better for him to contest for a Supreme Council seat as he lost in the bid for Youth Chief in 2009," he told a press conference in Pokok Sena, about 20km from here today.

"When Mukhriz lost in the contest for vice-president, they blamed the prime minister," said Haris.

He said he did not follow Mukhriz in joining the Parti Bersatu but chose to remain with UMNO.

"I did not follow Datuk Seri Mukhriz as I am with UMNO's struggle. UMNO is the institution for the Malay political struggle," he added.

Haris said he saw Parti Bersatu merely as a platform for Mukhriz's political ambitions to become prime minister.