The main difference between the Americans' aversion to immigrants in the 1800s and their aversion to immigrants in the early 20th century was that the former was based almost entirely on religion. Many of the Immigrants in the 19th century were Catholic, which did not sit well with the Protestant norm.
I am not exactly sure what you mean by this question. But from what I understand you may want websites to research law making and/or websites to create a law yourself. Here are some websites:
https://procon.org/
www.justia.com
www.oyez.org/
The Fifth Amendment of the United States Constitution addresses criminal procedure, this includes the Double Jeopardy Clause, which equips the defendants with the right to be tried only once in federal court for the same crime, making the later-found evidence null.
Provides water like I the river does
One of the many powers given to congress by the U.S constitution is the power to lay and collect taxes. Hope this helped!
