Trump Covid-19 diagnosis puts America's friends and foes on alert

Ripples of alarm, and some glee, coursed around the globe after President Donald Trump's Covid-19 diagnosis emerged, with U.S. allies and foes weighing whether the president's condition was a dangerous distraction or an opportunity.

If adversaries like Russia's Vladimir Putin, North Korea's Kim Jong Un or China's Xi Jinping "were looking for a moment to test American resolve abroad, they might be tempted by a moment when the U.S. leadership situation was so precarious," said Dan Shapiro, a former U.S. ambassador to Israel.

Trump's medical team said Sunday that his condition was improving after multiple "episodes" over the weekend, while disclosing that Trump was placed on a steroid therapy typically used in more severe Covid-19 cases.

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