Former Conservative MP Ed Holder officially declares candidacy for London mayor
Looking to make a comeback in municipal politics, Holder joins a crowded field
The official announcement is set to take place Thursday at Innovation Works building in downtown London.
Holder held a federal cabinet post as minister of state for science and technology under the Conservative government of former Prime Minister Stephen Harper.
He ran and lost to former television news anchor Kate Young in London West in the 2015 federal election.
Holder sought the Ontario Progressive Conservative nomination for London West, but withdrew in January following the dismissal of then-party leader Patrick Brown.
The former MP joins an increasingly crowded field of candidates vying for the top job at city hall after mayor Matt Brown announced he would not be seeking a second term.
There are now 14 candidates who have filed papers.
The race could be an interesting one, as it would be the first in the country to use ranked ballots.