OTTAWA – The Liberal leadership race is about to get two more candidates.

Vancouver M-P Joyce Murray is expected to make her announcement Sunday..

While Marc Garneau – Canada’s first man in space – is set to launch his bid on Wednesday in Montreal.

Garneau flew three space shuttle missions before running the Canadian Space Agency.

After being defeated in his first run for office in 2006, Garneau was elected in the tony Montreal riding of Westmount-Ville-Marie in 2008 and re-elected in 2011.

The former navy combat engineer is expected to give up his duties as Liberal House leader.