Under the proposal, the US will host 60 of the 80 games at the expanded tournament, with Mexico and Canada each hosting 10 matches. The final venues are yet to be determined. The US has lodged 17 preliminary venues and there are three each from Canada and Mexico.

Should the CONCACAF bid succeed, it will be the second time the US has hosted the tournament after staging the World Cup in 1994, the third for Mexico (1970 and 1986) and a first for Canada, who have never qualified but hosted the 2015 Women's World Cup successfully.

With FFA adding its support, the North American bid already boasts 28 confirmed backers as opposed to 20 for Morocco, with 163 nations still to announce their intended vote. The joint bid will have the support of the overwhelming majority of the CONCACAF nations who, although small in stature, represent 38 votes at the Congress.

All 10 South American nations are also reportedly supporting the North American bid while the 55-nation strong UEFA appears to be backing Morocco, which has never hosted a World Cup despite bidding for the 1994, 1998, 2006 and 2010 tournaments. Morocco has hosted several other FIFA tournaments including two Club World Cups (2013 and 2014) and four major continental championships.

The bid process is the first under FIFA's reforms that provide all of its members with a single vote each, with all votes to be made public after the winner is declared.