Chakra control is tough to master that is why no talent Naruto had to create a clone to use the rasengan. To my knowledge the way the technique works is that the original Naruto just releases a large amount of chakra and the clone does the chakra control including the spiraling and compacting of the chakra using its hands. By that logic anyone one who has enough chakra which would include Sasuke since it was stated that chidori uses more chakra than rasengan and knows shadow clones, which most chuunin and all jounin know should be able to use rasengan.

Quote Originally Posted by XanBcoo
But even if the Chidori "is" lightning, it's no different than the Katon Gokakyu no Jutsu being fire or some ice jutsu being ice. The handseals take the users Chakra and magically expel them as an element or attack.
This I will have to address later.