Here are the answers... I missed the question on the year the Constitution was written.
How many times can a senator be re-elected?
No limit
In what month is the new President inaugurated?
January
Which president was the first Commander In Chief of the U.S. military?
George Washington
What is the introduction to the Constitution called?
The Preamble
In what year was the Constitution written?
1787
Who has the power to declare war?
Congress
Who was the main writer of the Declaration of Independence?
Thomas Jefferson
Which countries were America's enemies during World War II?
Germany, Italy, and Japan
Which of the following was not one of the original thirteen states?
Vermont
What country did the US fight during the revolutionary war?
England