(CNN)The world was dumbfounded by the election of Donald Trump, and his first 100 days in office have done little to alleviate a deep sense of uncertainty and unpredictability. Indeed, as one observer put it, the last few weeks alone have caused a severe case of global geostrategic whiplash.
The number of campaign promises that have morphed into presidential U-turns is staggering. Allies and adversaries alike are trying to figure out whether a Trump Doctrine is emerging, or whether, as former CIA Director Michael Hayden recently told me, a discernible doctrine does not exist in what resembles a family-run business of policy from the White House.
National security adviser H.R. McMaster "has hired a very bright woman to write the US National Security Strategy," he said. "It's a tough job. I did it twice for George H.W. Bush. But I was building on precedent and historic consensus. It's really going to be interesting to see what an America First national security strategy looks like when you've got to write it down."
Long-time American allies are comforted, though, knowing McMaster and Defense Secretary Jim Mattis make up an experienced national security team. NATO partners also welcomed Trump's declaration that he no longer considers the transatlantic military alliance obsolete.
They, along with regional allies, supported Trump enforcing the previously declared US red line in Syria against the regime's use of chemical weapons on its own people. After such an attack that the West attributed to the Syrian government earlier in the month, Trump launched retaliatory strikes.
But Asian allies, such as South Korea and Japan, are worried about US policy on North Korea. They welcome the tougher stance against Kim Jong Un's ramped up nuclear missile program, but they were rattled by the USS Carl Vinson debacle, when for a time it was unclear if the aircraft carrier was steaming towards North Korea or not. It raised the question of whether the administration really has its deterrence policy in order, and South Korea was said to feel utter confusion, even betrayal, when the carrier was actually found to be steaming away from, not towards, the Korean Peninsula.
On Iran, signals are slightly harder to read. On the one hand, the State Department again certified Iran's compliance with the 2015 nuclear deal. Yet a day later, Secretary of State Rex Tillerson strongly hinted the US could walk away from it, or try to link it to other issues it has with Iran. So far the deal remains in place and neither the EU nor the UN would agree to reimpose international sanctions on Tehran, which helped bring the country to the negotiating table.
On the Paris Climate Accord, Trump's closest advisers seem to be having an almighty tussle about whether he should stay or stray from the historic deal. Big US companies like ExxonMobil are urging the US to abide by the deal and thereby have more say at the table.
Trump has also hosted Chinese President Xi Jinping at his Mar-a-Lago estate, and seems to have reversed many of his pledges to play hardball with Beijing. But on trade, just recently a Financial Times newspaper headline blared: "Trump Fires First Protectionist Warning over steel Industry," saying this paves the way for a global showdown on steel and possible sweeping tariffs on steel imports.
In his first 100 days, President Barack Obama visited nine countries. President George W. Bush visited two. Trump has visited none. But next month he visits Brussels for a NATO summit, and Sicily, for a meeting of the G7. Whether he can convince America's allies that they have a trust-worthy friend with a strategic worldview as their most powerful ally remains to be seen, abroad and at home.
"I think I know what the policy is," Hayden told me. "I have more difficulty, Christiane, putting this policy into a broader global view. And I think that's causing unease with you, with me, and with a whole bunch of other folks who are trying to see, 'Where are the Americans going globally?'"