Bersatu will pay for its "betrayal" of Pakatan Harapan by losing in the 15th general election (GE15).

According to former premier Dr Mahathir Mohamad, it would be a fitting comeuppance for a party that "backstabbed" a friend, to come to power through the "backdoor".

"Where is Bersatu? The party has no power now.

"Bersatu will also lose in GE15 because it does not have the support of Umno and PAS," said the Langkawi MP in a statement posted on his social media today.