Lieberman Calls Israel “Our” Country

Does Joe Lieberman consider himself a US citizens? Here he is quoted in The Hill:

… That calculation includes convincing Jewish leaders to back McCain, even if it means making the case that Obama would not be the leader Israel would want.
When asked about concerns he is creating the impression that Obama would not be a friend to Israel, Lieberman responded: “It’s my way of thinking that if I’ve concluded, as I have, that John McCain is best for our country, then why wouldn’t I do that?” [emphasis added]

“Our” country? He says ISRAEL, not the U.S. is “our” country??? This is supposedly a United States Senator here, who took an oath to defend the United States Constitution, saying here that Israel is his country, not the U.S.?