He became Member of Parliament for Taiping, Perak after defeating President of the People's Progressive Party (PPP), M. Kayveas with a majority of 11,298 votes in the 2008 General Election too on 8 March 2008.

In 2011, Nga Kor Ming used the term "metallic black" to describe Menteri Besar of Perak Zambry Abdul Kadir, during political rallies in Kamunting.

[9] It has been revealed that his wife's company was previously awarded the contract to make lounge suits for the councillors of Ipoh City Council (MBI) when Pakatan Rakyat (PR) was ruling Perak.

[11] In May 2018, Nga Kor Ming’s action of ridiculing Mahathir Mohamad by touching on the issue of his mortality, has been deemed rude, uncouth, extreme and disgusting, and runs contrary to the customs and norms of the people of Malaysia.

[12] In 2019, the naming of a new three-storey building of SJK (C) Sin Min, a Chinese primary school in Simpang, Perak, after Nga has raised a controversy.

[13] The 3D Chinese characters for 'Nga Kor Ming Building' affixed on the new block to honour Nga for helping to secure a RM220,000 government grant for the school, was questioned and condemned by certain quarters.

[15] On 27 October 2022 in Johor, Nga Kor Ming sparked another controversy in which he publicly claimed that Malaysians would be forced to wake up so early to work in Singapore and come home late at night if Barisan Nasional wins the election.

[16][17] Following that statement, he had clarification that he did not wish to offend anyone with his remarks and he claimed that the opposition had taken his comments out of context and he meant that Malaysia should maintain a mutually beneficial relationship with Singapore.