1.  What is the actual change Trump wants to make to US citizenship policy?
"...he wants to use an executive order to end birthright citizenship for children born in the US to unauthorized immigrant parents."

2. What does the Constitution say about citizenship?
The 14th Amendment which says that all persons born in the US and “subject to the jurisdiction of its laws” are citizens.
3. How does Trump give false information about the US compared to the rest of the world about this issue? 
"He claims the US is the only country that does this, but more than 30 do."

4. What steps would have to take place before Trump was ready to sign an executive order?
"it would need extensive review from the Department of Justice (specifically the Office of Legal Counsel) to assess its legality, and from the Department of Homeland Security and other departments to work out consequences."
5. What did the Supreme Court decide in Wong Kim Ark?
It states that "the children of noncitizens born in the United States are citizens."
6. Why might the Trump Administration feel that INS v Rios Pineda gives him legal grounds to issue this EO?
"The Supreme Court has never explicitly held, as a matter of law, that children of unauthorized immigrants born in the United States are citizens." "The statement was just dicta, or rhetoric."
7. Why might recent changes to the Supreme Court make the president confident that the SC would side with his actions?
He has many people on the Court that he has appointed and that side with him meaning they just might do what he says.