The propaganda apparatus of the empire works constantly to manufacture consent for military aggressions because it absolutely requires that consent.
With the Houthis successfully striking major targets inside Saudi Arabia and the UAE abruptly pulling forces out, the war in Yemen has reached a critical juncture. Remember, the Republican-controlled Senate approved a bill withdrawing support for the war back in March, which the White House had to veto in support of its fading hopes for its Israeli/Palestinian deal pushed by Jared Kushner.
The US/UK special relationship is longstanding. Throughout the post-WW II era, both nations have been imperial partners, the US calling the shots, Britain saluting and obeying.
Trump wants the unachievable. He wants a new nuclear deal and not to go to war with Iran. He needs to make the grand gesture soon, like firing John Bolton, but it may not be enough.