Canada's deputy prime minister — whose Ukrainian grandfather collaborated with the Nazi occupiers — has been tipped as the next head of NATO.Chrystia Freeland, a member of PM Justin Trudeau's Liberal Party who also holds the finance portfolio, declined to rule out taking over from NATO Secretary General Jens Stoltenberg when his extended term expires in 2023."I am really, really focused on those and on working hard with the prime minister, with my Cabinet colleagues, with Canadians to get through a challenging economic time in the world and to really capitalize on what I believe are tremendous opportunities ahead of...