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William Kipchirchir Samoei Arap Ruto (born 21 December 1966) is a Kenyan politician and the Deputy President of Kenya since 2013.
He served as the Acting President of Kenya between 5 and 8 October 2014 when President Uhuru Kenyatta was at the Hague.
He previously served in various ministerial positions, including the Ministry of Home Affairs, the Ministry of Agriculture, and the Ministry of Higher Education Science and Technology.
He was Secretary General of KANU, the former ruling political party, and the MP for Eldoret North Constituency between December 1997 and January 2013.
He won the seat in the 1997 Kenyan election after defeating Reuben Chesire.
He was appointed to the position of Assistant Minister in the Office of the President by President Daniel arap Moi in 1998.
He was promoted to be Minister for Home Affairs in August 2002.
Ruto also previously served as the Chairman of the Parliamentary Select Committee on Constitutional Reform in the 9th Parliament.
On 4 March 2013, he became the first Deputy President of Kenya, when he and Uhuru Kenyatta were declared winners of the hotly contested presidential election.
The duo won on a Jubilee Coalition ticket.
Ruto was among the list of people who were indicted to stand trial at the International Criminal Court (ICC) for their involvement in Kenya's 2007–08 political violence.
However, the ICC case was faced with challenges especially concerning withdrawal of key prosecution witnesses.
In April 2016, the International Criminal Court dropped the charges against Ruto.