In 1890, the German population of New York City was larger than the German population of Hamburg, Germany.²⁴

Ireland's population in 1840, just prior to the potato blight and the Great Famine, was larger than it is today.²⁵

Today, the population of Ireland is only around 6 million, while more than 44 million Americans claim Irish descent.²⁶

90% of the Central Pacific Railroad's workforce when building the transcontinental railroad was Chinese.²⁷

At the peak of its power, the Know-Nothing movement claimed to control more than 90 members of the United States House of Representatives.

Denis Kearney, who led the effort to ban immigration from China, was himself an immigrant (from Ireland).