After two and a half years of intense lobbying by Delta, American, and United they haven’t been able to get the US government to abrogate its Open Skies treaty with the UAE and Qatar and impose limits on flights and on price discounting by Emirates, Etihad, and Qatar. The Obama administration flat refused to do it.
Ultimately at this point it appears not to really matter whether the US airlines officially ‘win’ the battle, getting Congress or the administration to take action against the US airlines. They’ve already won by creating background uncertainty.