ProQuest Trends and Policy: U.S. Immigration This link opens in a new windowThis database combines various primary sources to provide in-depth background on a single topic. Primary sources in this database include legislation, executive orders, CRS reports, hearings, GAO reports, data from the annual reports and the Statistical Yearbook of the Immigration and Naturalization Service, newspaper articles, and press releases. Resources are organized by topic. Each topic has a brief summary of how the issue has developed over time and a timeline showing important events. There is also an overall timeline covering all of the topics. Topics include concepts, events, legal developments, and countries/geographic regions.