Samajwadi Party leader Shivpal Yadav has demanded that SP supremo Mulayam Singh Yadav take over as chief minister of Uttar Pradesh, in another twist to the warring within the state’s ruling Samajwadi Party family.”He (Mulayam Singh) should take over as the Chief Minister of Uttar Pradesh,” Shivpal Singh said while addressing party workers here, a day after he was sacked as minister by his nephew, Chief Minister Akhilesh Yadav.