Trump's control of his base is what keeps congressional Republicans in line. Republicans - at least until the Midterms next month - control the presidency and both houses of Congress.
Three weeks ago, the New York Times published a lengthy investigation into Trump's business dealings that has had no political impact on the president at all.
Trump's supporters - who have long considered themselves ignored by the urban power elites - appreciate his laser focus on them.
Trump was almost certainly channelling his base when he spoke bluntly about not wanting to put US arms sales to Saudi Arabia at risk over the killing of journalist Jamal Khashoggi. He spelled out that the US would be harming itself. He added that Khashoggi was effectively not one of them: A resident, not a US citizen.
The entire Saudi crisis up until Saturday's confirmation of Khashoggi's death has been a transparent dance where Trump has tried to get Crown Prince Mohammed bin Salman safely off the floor. The US and European powers don't want their relationships with the Saudis to be harmed. Trump's own business ties with the Saudis date to at least the 1990s.
Trump repeated the shaky official Saudi denials to quarantine its rulers from blame. Khashoggi's continued disappearance, news of an audio tape, flight logs of agents flying to Turkey, evidence said to be found at the Istanbul consulate, cleaners and newly applied paint at the site and links between suspects and the prince pointed the other way.
Now, any responsibility will be kept away from royalty via an investigation run by the Saudis themselves. They have called it a quarrel that got out of hand and arrested 18. Inconvenient facts won't get in the way.