Pro12 in talks over North American teams joining expanded league

• Sides from US and Canada could join 14-team league by end of decade• Pro12 boosted by Guinness’s decision to extend sponsorship until 2020The Guinness Pro12, the only professional cross-border league in Europe, is considering expanding into North America as the organisers look at ways of closing the financial gap with the Premiership and Top 14.Pro12 officials will next month fly out to meet representatives from the United States and Canada unions to discuss expanding the league to 14 teams before the end of the decade, having been boosted by Guinness’s decision to extend its sponsorshi…