Conservatives leader Colin Craig says he has lost 30kg to prepare for election year by giving up cream buns and mince pies.
Mr Craig said that in June his weight had reached 105kg because of his fondness for "the bakery section".
"In the middle of last year I made a very serious determination that I was going to get into good physical condition. I knew I'd need to be in good shape this year."
Mr Craig cut all sugary foods from his diet and began walking and lifting weights before work.
He no longer drinks alcohol except at social events.