Not on a tourist passport. It'll can be considered fraud. A K-1 visa would be the quikest route to go. its a diffrent sitution if he/she is already in the states on another visa.
Yes. They will not ask you how or when you entered the United States.
No they don't need a passport. Adults only need a passport to enter foreign countries. Americans can travel freely between the U. S. states.
You can use the passport from your country of citizenship. A foreign passport is acceptable as identification for many purposes, but do not show your address. Some countries, such as Mexico, issue national ID cards showing the address of one's foreign residence (i.e., "matricula consular"). I believe there are one or two states that will still issue a driver's license to an alien without a green card, but states are beginning to implement the provisions of the RealID Act of 2005 which prohibits that. An alien cannot legally obtain a social security card or a US passport or passport card.
Managing national security
While in Mexico, for a Mexican national? You need to get a passport at the closest Foreign Relations Secretariat office (see related links). You will also require a visa or border crossing card for both Canada and the United States. (also see related links)
Anyone traveling into the United States including Alaska, Hawaii and any of its territories needs to have a passport unless they are a United States citizen or a national of one of the territories.
Contact the nearest branch of the embassy of the country that issued the passport. Or visit the United States Department of State, http://www.state.gov for a list of the contact information for all embassies.
Diplomacy
No, any foreign national who has entered the United States illegally is not eligible for permanent residence status regardless of the type of sponsorship. INA Section 212(a)(6)(A), 8 United States Code, Section 1182(a)(6)(A).
Only if you start or end in a foreign port. Cruises are considered closed circuit journeys and as long as you begin and end in the United States you do not need a passport.
The National Security Council in the United States is responsible for informing the President of the United States about breaches in the security of the country. They also advice the President about what to do in the case of this breach in security.
The illegal foreign national will still be required to follow the prescribed USCIS procedures. This could mean the person will be required to leave the U.S. and then apply for a visa for reentrance. A foreign national whether illegal or not is not automatically granted permanent residency or citizenship status by marriage to a U.S. citizen. Marriage will sometimes (but not always) change the priority status given to an applicant's request. United States Citizenship and Immigration Services, http://www.uscis.gov