Washington is not going to support statespersons, people with caliber/gravitas. People of principle, people who have been tested, people who cannot be turned. They are not interested in that. It is not comprador material.
Ever worked at a company and wondered how the heck some people ever got promoted? Ever heard of the ‘Peter principle’? I feel quite confident that ‘Green’ politicians are quite welcome at US embassies everywhere, “We are children of Thatcher, We are true Atlanticists” being the magic words that make it into US embassy cables.
Meanwhile the Greens themselves likely say “This is our only chance” as in: The old canard that it doesn’t matter what you believe if you don’t hold power. In fact the opposite is true - nobody forgets a courageous act, it sears itself into the popular consciousness.