Khashoggi effect? US calls for ceasefire in Yemen

Is the Trump administration distancing itself from Saudi Arabia's crown prince, and more specifically his war in Yemen? The US defence secretary and his counterpart at the State Department are calling on both sides to lay down their arms. Could Yemen be feeling a Khashoggi effect? Has Washington grown tired of supporting an offensive that's killed civilians indiscriminately and left the Arab world's poorest nation facing cholera and starvation?