Buenos Aires( CNN) President Donald Trump was only a half-hour into his nine-hour flight to the G2 0 summit here in the Argentine capital when he decided to pull the plug on the most hotly anticipated moment of his journey: a lengthy face-to-face with Russian President Vladimir Putin.

Trump's schemed meetings with a half-dozen other world leaders — combined with the possibility of diplomatic snafus — offer little promise of clearing the smoke of suspicion that is once again following him abroad.

The President also refused to back away from the shadow of the Mueller investigation, beginning his day with a fresh pair of tweets about the Cohen saga, saying his business dealings while a candidate were “very legal& very cool.”

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