Deputy President William Ruto has been asked to go for an executive position no matter the changes in the law ahead of the 2022 general elections.
A section of President Uhuru Kenyatta and ODM leader Raila Odinga's allies are now pushing for the introduction of the powerful PM post.
Previously, Dr Ruto has resisted such changes, arguing that Kenya should still embrace the presidential system.
But Tinderet MP Julius Melly on Sunday said Dr Ruto will be forced to go for executive Prime Minister should Building Bridges Initiative (BBI) report suggest so.
"We know the changes they are planning. They want to make the presidency weak in the Building Bridges Initiative report," he said according to a video shared by Citizen TV on Twitter.
Melly added:" However, Ruto will go to the position which is powerful, be it the Prime Minister post. He shall go for that post."
His remarks come a day after Kapseret MP Oscar Sudi echoed similar sentiments, arguing that Dr Ruto is not afraid of the parliamentary system of government.
In the BBI report that was submitted to President Uhuru Kenyatta in November, the team proposed a weak PM post.
However, ODM party and a number of leaders allied to Uhuru, wants the clause changed to pave way for Parliamentary system of government.