Another factor to remember with the US growth is that a militaristic state aiming to challenge British hegemony will most likely be enforcing taxation and conscription on its population - which will probably reduce the attractiveness of the US for the extensive migration it received OTL. Traditionally, the more nationalist constituents of the US have often been against immigration of non-WASP groups. The Chinese Exclusion Act of 1882 might look more like the 1924 legislation, which set a fixed number and maximum percentage based on existing groups as identified by the cencus.
A lot of the Italians, Irish, Hungarians, Slovenes, Poles, Austrian and South German catholics might want to go to Canada instead of the US due to these factors. The US population could very well be 10-20% smaller than OTL by 1910.
A lot of the Italians, Irish, Hungarians, Slovenes, Poles, Austrian and South German catholics might want to go to Canada instead of the US due to these factors. The US population could very well be 10-20% smaller than OTL by 1910.