Rafizi, who is also PKR vice-president, said apart from Penang, Selangor and the Federal Territories, Harapan's Malay support was slightly behind BN, from a range of 3.5 percent to 13.1 percent.

Key: Mixed-seats

In view of the expected high non-Malay support for Harapan, Rafizi said this would help the coalition win in most of the 90 mixed-ethnicity parliamentary constituencies, while the 35 non-Malay majority constituencies were already in the bag.

"I need to bring the perspective of vote differential. In order to produce the kind of result that BN achieved in the last election, BN had a 30 percent advantage over (Harapan's predecessor) Pakatan Rakyat in terms of Malay support.

"Look at the differential now. There is not a single state where it is above even 20 percent," he added.

Rafizi explained that the predictions were not the result of "gut feelings" but based on the model that Invoke had designed.

Some of the bold predictions by Invoke's model was that Harapan would sweep all parliamentary seats in Selangor and win 54 out of 56 state seats.

PAS is 'strong', but...

Invoke also predicted that BN would win all parliamentary seats in Terengganu and lose only one state seat – Bandar – to Harapan.

As for Kelantan, Invoke's model predicted that Harapan would win one parliamentary seat and three state seats with the rest going to BN.

Rafizi said Invoke's model did not suggest PAS was weak and in fact, the party controlled about a quarter of the Malay vote.

"However, they need at least 40 percent to win anywhere," he said in view of the fact that PAS' non-Muslim support was negligible.

Invoke's election prediction model assumed that 75 to 82 percent of Chinese voters and between 45 and 55 percent of Indian voters would back Harapan.