Several days ago, we looked at the big picture of US immigration, presenting the place of origin of America's 40 million foreign-born residents. However, as is always the case with the US, focusing on the big picture at the national level ignores the nuances at the state level. The following two charts using Pew Research data, compiled by the WaPo, show the dramatic changes in the land of origin of US immigrants, beginning with 1910 when Germany was the primary driver of US-born residents, accounting for 18% of US immigrants, and proceeding through 2010, when Mexico has become the...