Former Conservative MP for Surrey North, Dona Cadman, has broken ranks with her party and is endorsing the Liberals for the 2015 election.

She represented the riding of Surrey North in the House of Commons from 2008 to 2011 and is the widow of Chuck Cadman, also a former member of parliament for Surrey North, which has been folded into other ridings for the 2015 election.

He had a tumultuous relationship with the Conservative Party after starting in politics with the Reform Party of Canada and then the Canadian Alliance before winning his seat in the 2004 election as an independent, refusing offers to rejoin the Conservatives.

Chuck Cadman played a pivotal role in averting a 2005 summer election, when he sided with then prime minister Paul Martin and the Liberals in a confidence vote.

Dona Cadman, right, is seen in this undated picture campaigning with her late husband Chuck Cadman. ((CBC))

A release on Saturday from the Liberals, but signed by Dona Cadman, says that she and her late husband started out with the Reform Party because of their family and community values.

"I have tried to stay true to this as the Conservative Party changed into what it is today," said the release. "But at this point, I do not feel comfortable with much of what is being done and even less of how it is being done."

Cadman said crime continues to be the biggest issue facing Surrey and a government is needed that is willing "to look at the root causes of crime ... willing to support those who are building intervention programs; that is supportive of those fostering rehabilitation."

Cadman is supporting Surrey Centre Liberal candidate Randeep Sarai.