In early 2009, along with Mohd Osman Mohd Jailu and Hee Yit Fong, he resigned from the People's Justice Party (PKR) to sit as an independent, supporting the fall of the Mohammad Nizar Jamaluddin-led government and precipitating the 2009 Perak Constitutional crisis.
He was a candidate to be Menteri Besar (First Minister) of Perak following the election, but Mohammad Nizar Jamaluddin from PAS was chosen.
In the 2013 Perak state elections, although Jamaluddin considered to defend his Behrang seat as an independent, he decided to not contest and lend his support to Barisan Nasional candidate Rusnah Kassim.
Jamaluddin had applied to join BERSATU together with the Sungai Manik state assemblyman, Zainol Fadzi Paharudin.
[3] He however failed to make a major impression on the election, only garnering 1032 votes and losing his deposit.