Barton Vader is a Canadian citizen who has always lived in London, Ontario. He has a spouse and two school-aged children. As of May 2017, he accepts a new employment position in Akron, Ohio. On October 1, 2017, he moves to Akron to locate housing for his family. In order for his children to finish the school term, his family remains in London until January 1, 2018. When they move, John severs all residential ties with Canada other than the family residence. The residence is placed on the market in January, 2018. However, it has not been sold as of December 31, 2018. While Barton was scheduled to begin working in the U.S. in early 2018, he is unable to obtain the required residency documents until July 1, 2018. Explain Barton's Canadian tax status for the years 2017 and 2018