Kenya's president on Monday criticized the International Criminal Court as "not impartial," saying his government "will give serious thought" to its membership of the court.

In a speech during celebrations marking 53 years since Kenya became independent, President Uhuru Kenyatta said he believed he would win a second term next year despite what he called "divisive politicians, external powers, the ICC or paid protesters."

Kenyatta was elected in 2013 as he and his running mate, William Ruto, faced criminal charges at the ICC over their alleged roles in post-election violence in 2007-2008.

The charges against Kenyatta were withdrawn in 2014 while the case against Ruto was terminated earlier this year.

"In our pursuit of a more stable and just order, we are champions of global institutions grounded in fairness and respect for national sovereignty," Kenyatta said Monday. "The Kenyan cases at the International Criminal Court have ended but the experience has given us cause to observe that this institution has become a tool of global power politics and not the justice it was built to dispense."

He added: "We have started to see many more nations openly recognizing that the ICC is not impartial. Some have withdrawn. Others have considered that step. Twice, our parliament has passed motions to withdraw. We have sought the changes that will align the ICC to respect national sovereignty. Those changes have not been forthcoming. We will therefore need to give serious thought to our membership."