Elgeyo Marakwet Senator Kipchumba Murkomen wants the ICC to drop charges against Deputy President William Rut and journalist Joshua arap Sang to strengthen peace and reconciliation in Rift Valley.
He said there were all indications that the case was weak and the ICC should not hold on it unnecessarily.
"Even the ICC itself admits the case is weak and they are looking for more evidence. There is no evidence at all and we expect the court to drop the cases very soon," Murkomen said.
He was speaking at St Peter's Seminary, Eldoret, on Saturday.
"We want to celebrate the peace we have achieved so far, but we cannot do that when the ICC is still pursuing the case against our brothers," Murkomen said.
People from the region displaced in the 2007-08 post-election violence also want the cases dropped.
The families resettled by the government argue that dropping the cases would strengthen peace and reconciliation.
The more than 1,000 former IDPs held a peace procession at Timboroa.
They said the latest admission by ICC Chief Prosecutor Fatou Bensouda that she does not have strong evidence in Ruto's case is reason enough to drop the charges.
"We ask her to request the court to terminate the case because it has been too weak all along," said the IDPs' chairman Stephen Mbugua
He said communities have achieved a lot in reconciliation and there is no need for the cases to continue.
"It's no longer in the interest of Kenyans to have the cases at the Hague. We ask the ICC to terminate them so we move forward with reconciliation and peace as a country," Mbugua said.