Here's an interesting AHC: Delay the Chinese Exclusion Act in the US for as long as possible. For instance, Canada had a head tax on Chinese immigrants (but not on any other immigrants--how convenient!) but didn't pass a similar Chinese Exclusion Act until 1923. FWIW, I was thinking of having James A. Garfield survive, experience an epiphany in regards to this question, and narrowly win reelection in 1884, but I fear that this will only delay Chinese Exclusion by several years since Garfield's successor--specifically whoever wins in 1888, either his Secretary of State James G. Blaine or some Democrat--is likely to support Chinese Exclusion, so we might see a Chinese Exclusion Act of 1890 instead of a Chinese Exclusion Act of 1882. Is there any realistic way to avoid this outcome? Any thoughts on this?