Career
He was also the chief whip in parliament and he has represented Gachoka Constituency (1997-2002) and formerly Kamukunji Constituency (2002-2007 ) for the National Rainbow Coalition (NARC) party. During the norminations of PNU for the elections of 2007, Mr Nyagah lost to Simon Mbugua nominations and defected to a small party headed by Kalembe Ndile called T.I.P The Independent Party of Kenya.