The Australian Conservatives will target at least three NSW lower house seats in the state election, including Wagga Wagga, where a long-time Liberal has joined Cory Bernardi's party to take on the Nationals.

President of the Wagga Wagga Liberals, Colin Taggart, has quit the party in protest over the Liberals not contesting the Riverina seat and will run for the Australian Conservatives in the March election.

Colin Taggart. Credit:The Daily Advertiser

Mr Taggart last week resigned from the NSW Liberals, citing the decision not to contest Wagga Wagga as a "grave mistake which disenfranchises Liberal voters".

The Nationals are running in Wagga Wagga after the Liberals lost the once blue-ribbon seat in a bruising byelection just weeks after the federal Liberal Party dumped Malcolm Turnbull as prime minister.