Dan Barker is set to take on Mr Burnham for the position of Metro Mayor on May 2.
Mr Barker is an underdog because Mr Burnham is the only one in the role since its creation around six years ago.
He won the first election with a little less than two thirds of the vote and the second election with a little more than two thirds of the vote and no borough backed anyone else on either occasion.
The Conservative Party challenger,…