Question:  William Samoei arap Ruto served as the Acting President for a Kenyan politician who is currently a member of what party?
Context: Gideon Moi (born 22 October 1963) is a Kenyan politician who has served in the Senate of Kenya, representing Baringo County, since 2013.  He was elected with a landslide win of over 80%, trouncing his opponent Jackson Kosgei.  He is also the Chairman of the Kenya African National Union (KANU), which for decades was the ruling party in Kenya.  He is the youngest son of Kenya's second president, Daniel arap Moi, and Lena Moi. William Samoei arap Ruto (born 21 December 1966) is a Kenyan politician who has been Deputy President of Kenya since 2013.  He served as the Acting President of Kenya between 5 and 8 October 2014 while President Uhuru Kenyatta was away at the Hague.  He previously served in various ministerial positions including the Ministry of Agriculture and Ministry of Higher Education.  He was Secretary General of KANU, the former ruling political party, and 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.  He also previously served as the Chairman of the Parliamentary Select Committee on Constitutional Reform in the 9th Parliament. Daniel Toroitich arap Moi (born 2 September 1924) is a former Kenyan politician who served as the second President of Kenya from 1978 to 2002.  Through popular agitation and external pressures, he was forced to allow multiparty elections in 1992; he led his party, KANU, to victory in the 1992 and 1997 elections.  Prior to becoming President, he served as the third Vice President of Kenya from 1967 to 1978. Kipng'eno Arap Ng'eny (c. 1948 – July 1, 2014) was a Kenyan politician and telecommunications executive.  He served as the Managing Director of the now defunct Kenya Posts and Telecommunications Corporation from 1979 until 1993.  Ng'eny also served as a member of the Parliament of Kenya for Ainamoi from 1997 to 2002 and the country's Minister of Water Development within the administration of former President Daniel arap Moi. Ekwee David Ethuro (born 31 December 1963) is a Kenyan politician.  He was elected as the first Speaker of the modern Kenyan Senate on 28 March 2013.  From 1998 to 2013 he served as a Member of Parliament representing Turkana Central.  He also served as the Assistant Minister for Planning and National Development from 1998 to 2002 under the government of President Daniel arap Moi.  He was re-elected as Member of Parliament for Turkana Central in the 2007 general elections and steered the proceedings of the 10th Parliament in the position of acting Speaker of the House whenever the Speaker and the Deputy Speaker were absent. Peter Adhu Awiti (died 15 July 2014) was a Kenyan politician who served as a member of the National Assembly for Karachuonyo Constituency from 1997 until 2007.  He also served in former President Daniel arap Moi's final government cabinet as Minister for Planning from 2001 until 2002. The Honorable Dr. John Robert Ouko (31 March 1931 – c. 13 February 1990), commonly known as Robert Ouko, was a Kenyan politician who served as Foreign Minister of Kenya from 1979 to 1983 and from 1988 to 1990.  Robert Ouko served in the government of Kenya from the colonial period through the presidencies of Jomo Kenyatta and Daniel arap Moi.  He was a member of the National Assembly for Kisumu and a cabinet minister, rising to the post of Minister of Foreign Affairs and International Cooperation by 1990.  He was murdered in Kenya on 13 February 1990.  The murder case, perhaps the most intriguing in Kenyan history, remains unsolved. Uhuru Muigai Kenyatta ( ; born 26 October 1961) is a Kenyan politician who is the Fourth President of Kenya, in office from 2013.  He served as the Member of Parliament for Gatundu South from 2002 to 2013.  Currently a member of the Jubilee Party of Kenya, he was previously involved with The National Alliance and before that the Kenya African National Union. John Koech is a Kenyan politician.  He was cabinet minister for the East African Community in Kenya under President Mwai Kibaki and a member of parliament for the constituency of Chepalungu until December 2007 when he lost his parliamentary seat to Isaac Ruto, and dismissed from his cabinet post for supporting Raila Odinga against Kibaki. Agustino Neto is a Kenyan politician and lawyer who was elected Member of Parliament for the Ndhiwa Constituency, running on an ODM ticket, in a by-election in September 2012.  He was among a group of activists that filed a case In Kenya's High Court attempting to disqualify Uhuru Kenyatta and William Ruto from contesting in Kenya's general Election of 2013.
Answer: Jubilee Party of Kenya