Vote, hold public office, drive (in nearly all states), etc.
No, you cannot get a drivers license in Canada if you are a US citizen.
Aliens do not exist, and thus, they cannot marry any US citizen.
No, a US citizen cannot travel internationally without a passport.
An Indian cannot become a US citizen by marrying a US citizen. Not only Indians, but any other person from another country cannot become a US citizen just by marrying a US citizen. A US citizen can sponsor a Indian on an appropriate visa ( like K-1 visa) after which he/she can adjust their status to that of a permanent resident. After being a PR for 3 yrs, the Indian can then apply for US citizenship, if needed.
You can but be aware, that the UK citizen cannot legally change their status while in the US. It depends on where you both want to live. If the US citizen wants to come back to the UK, a marriage visa is needed from the British Embassy in the US. However if the UK citizen wants to live in the US, they will have to go back to the UK and the US citizen will then need to file the I-130. Until it comes through you cannot live in the US, but will have to wait in the UK.
No, he was born in Austria. Therefore he cannot be a natural born citizen.
Vote or hold public office, such as President of the United States.
"nonus /-a /-um"
You need the passport of the country of which you are a citizen. You cannot have a US passport until you are a US citizen.
A non us citizen cannot become president because he or she needs to reside in the United States of America and be an official citizen.
No they cannot. You must be a US citizen to enter.
Go by without a green card