“If I can bring peace to other countries, why can’t I bring peace to my own?” the Ekiti state governor said.
Mr Soyinka said Muslims should stop with the “rhetoric” on what Islam was or not and show action in their “pietistic condemnations”.
The former Lagos governor said his Kaduna ally had been “making the progress” around social and economic issues in his state.
The deceased, identified only as Ms Deborah, was accused of passing unflattering comments about Prophet Mohammed on campus.
Mr Saraki made the pledge, among other affirmations at a media parley in Abuja on Thursday.
Mr Umahi, a presidential aspirant, expressed his optimism at a town hall meeting between Mr Buhari and South-East leaders in Abakaliki, the Ebonyi State capital, on Friday.
The labour leader stated that the first step in combating casualisation in the industry would be to unionise the workers.