Conservative MP Erin O'Toole speaks during a news conference, Wednesday October 11, 2017 in Ottawa. Several Conservative officials are arguing that new electoral laws should not apply retroactively, after they were required to return the proceeds from two fundraising events held earlier this year. The Tory electoral district associations in Mississauga—Streetsville and Durham returned to donors funds connected to two events in January, one attended by Conservative Deputy Leader Lisa Raitt and the other by foreign affairs critic Erin O'Toole. THE CANADIAN PRESS/Adrian Wyld