Short answers, pulled from the story.
The Canadian Soccer Association president Victor Montagliani confirmed plans for a Canadian bid in July 2012. The three nations officially announced their intent to submit a joint bid on the 10th of April 2017.
The United Bid Committee released a list of 49 stadiums across 44 metropolitan markets including BC Place in Vancouver and Estadio Azteca in Mexico City. The official bid selected 16 cities with venues such as MetLife Stadium in East Rutherford and SoFi Stadium in Inglewood.
The final decision occurred at the 68th FIFA Congress in Moscow, Russia, on the 13th of June 2018. The United bid received 134 votes while Morocco secured 65 votes.
Canada hosts 13 matches while Mexico also hosts 13 matches. The United States takes responsibility for 78 matches including all quarter-finals onward.
Controversies arose regarding U.S. immigration policies implemented during Trump's first term in 2017. Visa wait times averaged roughly one year raising fears fans might not arrive in time before the tournament.