only if the baby was born in the us
Only if you are a US citizen.
If one of the parents is a US citizen, the child is a natural born US citizen. Yes, they can run for president.
A native-born US citizen. This is not necessary to be president however, you need only be a natural-born US citizen.
not legally, only if you get married.
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.
only if a US citizen has dual citizenship with another country, than you can have a passport for each country.
only if the person marries a US citizen
Any British citizen can enter the US on the Visa waiver program for 3 months as a tourist only--working is not allowed.
No, US laws state you can only be an American citizen.
If you are a US citizen living in the US, marrying a British citizen won't affect your Medicare benefits. That only becomes a problem if you move out of the country.
Obama is the only president with one parent that was not a US citizen. Both of Jackson's parents were born in Ireland and his father died before the US came into existence but he would have been a US citizen had he lived longer. All of the other presidential parents were born in what is now the US.