Umno veteran Shahrir Abdul Samad said it was impossible for his party to form an alliance with DAP because of the latter's secularist tendencies.

At a forum today, Shahrir said DAP had an unsuccessful track record when it attempted to collaborate with conservatives such as Bersatu and PAS in the past.

"The conservatives (in Pakatan Harapan) were Bersatu. These conservatives were all former Umno members. They cannot sit together with secularists. Hence (Harapan) broke apart," he said.