US has not stopped Dual Citizenship. It was banned in the 19th century, however, due to changes in law, it was again revised in the 20th century. It is only allowed at considering certain circumstances. America considers many factors before issuing it to the individual irrespective of the country born. Individual's citizenship is based upon the parent's origin country. Suppose a child is born outside US, parents are US citizens, then the child will be given dual citizenship one from the country born and US citizenship based upon parents. Naturalization is also common nowadays for getting dual citizenship.
The US recognizes dual citizenship.
she have to marry again in israeli
Yes, dual nationality doesn't stop you from getting a British Passport.
By law, the US doesn't recognize dual citizenship (i.e. constitution prevents dual nationality) but somehow it always does recognize it.
No. The US president MUST have US citizenship only.
Yes dual citizenship is allowed for US citizens.
Yes.
Spain does not have dual citizenship agreement with the US.
If you apply for citizenship in another country your US citizenship is automatically revoked. The US does not recognize dual citizenship. You revoke it in writing at a US embassy, outside the US.
If you have dual citizenship, yes you can.
He will become a dual citizen of the uK and the US.
You can apply for dual citizenship to the USA and almost any other country. Many more people than you might think hold dual citizenship. But the road to dual citizenship, with only a few exceptions, is long, twisting and full of "gotchas".