A visit by president Biden to Canada to meet president Trudeau shows a unity of purpose of the two leaders who have a close Justin and Joe relationship, says this report in NYT. Before the trip an agreement had been reached by which the two countries can ease pressures of migration from the southern hemisphere. Migrants seeking asylum in Canada from the US will be turned back at Roxham Crossing. Canada will accept 15,000 refugees from persecution, violence or economic devastation, to ease pressures of illegal crossings into the US from Mexico. The trip comes after Trudeau's frosty relationship with former president Trump. It also comes as Canada and the US build a closer relationship to meet challenges of multipolar world from China.