It has become a two-horse race, according to the head of Western University's Political Science Department, with both candidates purporting to represent true change at city hall.
On Tuesday, mayoral candidate Roger Caranci pulled out of the race and announced his support for Paul Cheng, but what impact will it really have?
Less than two weeks from election day, voter Ron Kotis says "His endorsement will do a lot of for Mr. Cheng because I have heard a lot of people say a businessman can't run city hall."
Rebecca Bauer disagrees, saying, "It didn't impact my voting at all, but I think for one person to drop out and put their support behind somebody else is really good."
Recent polls suggest Londoners are looking for a change, but it's still unclear how much change voters want and in which direction.
Candidate Matt Brown represented change when compared to former mayor Joe Fontana, but he now faces a true outsider in Cheng - who claims to offer the greatest amount of change.
Western University political scientist Martin Horak says voters need to decide what change really means to them.
"Paul Cheng is a complete outsider here and comes with some pretty radical ideas about how to run the city. Matt Brown also represents a certain kind of change, because he is relatively new, relatively young and supports the London Plan."
And Horak believes change may also be coming to the role candidate Joe Swan plays in the election - from presumed front-runner to possible kingmaker.
"It seems impossible for him to recover from these polling numbers, but it's probably going to be a very close race so what will matter is who he chooses to criticize out of the two front-runners and what kinds of questions he asks."
With less than two weeks until Election Day, Horak says voters can expect the two leading candidates to pull out all the stops before Oct. 27.
