The I-word -- impeachment -- was in the air as Democrats and mainstream media muttered that he was obstructing justice by attempting to throttle investigation of collusion with the Russians. Brainy and quirky conservative New York Times columnist Ross Douthat argued that the Trump Cabinet should remove him from office as unfit under the 25th Amendment.
So it has been something of a surprise to see the Trump who emerged from Air Force One in Riyadh behaving quite differently, like a competent American president.
In Saudi Arabia, he delivered a sobering speech that invites comparison with Barack Obama's Cairo address to the Muslim world almost exactly eight years ago.
Obama apologized for the misdeeds of the West, ranging from the Crusades a millennium ago to 19th- and 20th-century colonialism to the overthrow of the Mosaddegh regime in Iran eight years before he was born. Trump apologized for nothing.
Instead, before an assembly of leaders from about 50 Muslim-majority nations, Trump denounced in no uncertain terms Islamic extremism and Islamic terror groups and insisted that Muslims must "drive them out" of their places of worship, communities and "holy land."
Trump also announced a $110 billion arms sale to Saudi Arabia and denounced Iran for fueling "the fires of sectarian conflict and terror." This presumably delighted the Saudis and the leaders of Egypt, Jordan and the Persian Gulf States, who were dismayed at Obama's eight-year tilt toward Iran.
That started with his cold indifference to the mullah regime's squashing of the 2009 protests and culminated in the 2015 nuclear agreement, which, as Obama adviser Ben Rhodes confessed to The New York Times Magazine, was pushed through with a false "narrative" and a compliant media "echo chamber."
At best, the deal delayed Iran's acquisition of nuclear arms; it has not changed Iran's terrorist-supporting behavior as Obama apparently hoped. Trump's turn to an explicitly anti-Iran policy may turn out better.
Trump then journeyed to Israel -- on the first scheduled nonstop flight from Riyadh to Tel Aviv in history -- and became the first sitting president to visit the Western Wall. In Bethlehem, at the side of Palestinian leader Mahmoud Abbas, he condemned the "evil losers" responsible for the bombing of a concert hall in Manchester, England. In Vatican City, emerging from an apparently amicable meeting with Pope Francis, Trump said, "I won't forget what you said."
The next stops, as this is written, are a NATO meeting in Brussels and a G-7 meeting in Taormina, Sicily. It's possible that Trump will commit some dreadful faux pas along the way. But so far, he has been behaving presidentially.
That may come as a surprise to critics. New York Times editorialists have whined that he is forsaking the policies of his two immediate predecessors, but they haven't fully explained why those policies should be followed. In fact, Trump has not gone so far as his campaign rhetoric sometimes suggested.
The U.S. Embassy remains in Tel Aviv, not Jerusalem; the Iranian nuclear deal has not been renounced; America remains a signer of the Paris climate declaration. John Bolton complained in The Wall Street Journal that Trump has failed to make changes abroad, just as Ann Coulter is complaining that he is failing to build the wall along our southern border.
My tentative conclusion is that Trump is more of a conventional president than he promised or than his critics fear. His early morning tweets are unnerving; his propensity for unrehearsed ad-libs is potentially dangerous; his taste in interior decoration is appalling.
But the notion that he won the presidency through collusion with Russia is implausible and is wholly without evidence. His odd campaign statements about Vladimir Putin and Russia were known to voters, and Hillary Clinton made intelligent criticism of them in the debates.
Democrats and journalists assuming that further investigations will lead to impeachment are pursuing what movie director Alfred Hitchcock called a MacGuffin -- something a movie's characters are pursuing that is, to quote Wikipedia, "typically unimportant to the overall plot."
Now the question is whether Donald Trump, after acting like a president abroad, can start doing so at home.