US has played lip service to illegality of Israels abuse of the Palestinians, but it has vetoéd every UN resolution trying to redress the criminal behaviour of Israel. Therefore US are simply collaborators, not worth the time of day. Go straight to ICC, there are no other options. Good luck.
NYT: U.S. Vice President Joe Biden considering run for 2016 presidency (Reuters)
from the article: Palestinian official: If anyone can change Israel's attitude, it's Obama