Pew Research census from three years ago determined that 66% of American Orthodox Jews are chareidim. I’d argue they notably underestimated the chareidi portion since their survey was vastly underrepresented in all-chareidi enclaves such as KJ and NS where they speak Yiddish and most won’t answer their survey.
I have no doubt that the vast majority of chareidi Jews opposed the creation of the state at the time it happened as well as today feel it was a historical/religious error in retrospect. Even if they support the continued current existence of the state due to the alternative at this point being dangerous.