Name the two ways in which Congress has informally amended the Constitution?
There is no way that Congress can legally amend the Constitution informally. However, both the White House, and the courts have done so with Executive Orders, Decrees, and Judicial Creative Interpretations.
Yes, by the same process that amendments to the Constitution itself are made. Article 5 provides for amending the Constitution. Since the Constitution itself can be amended and since the Bill of Rights is a part of the Constitution, then it can be amended as well. The Bill of Rights is just a name given to the first ten amendments. They have no special status. The 18th amendment, Prohibition, was itself amended out of existence…
The United States Constitution was adopted on September 17, 1787, by the Constitutional Convention in Philadelphia, Pennsylvania, and ratified by conventions in each U.S. state in the name of "The People". The Constitution has been amended twenty-seven times; the first ten amendments are known as the Bill of Rights.