It is possible for someone to be clone. Those clone individuals are not as smart as the original person.
The risks of cloning
High failure rate*
They usually failures in the process of cloning. The rate rage from 0.1% to 3%.
Problems during later development
Clone animals that do survive tend to be much bigger at birth than their natural counterparts. They also have abnormally large organs and can lead to breathing, blood flow and other problems.
Abnormal gene expression patterns
In cloning, the transferred nucleus does not have the same program as a natural embryo.
As cell divide, their chromosomes get shorter.