"Everyone should be calm and safe!" Trump tweeted after landing in Pittsburgh for an event on manufacturing.
Trump's comments only underscore the basic class unity between the ruling classes in the US, China and around the world against the resurgence of working-class struggle internationally, of which the protests in Hong Kong are one initial expression.
The demonstrations on Tuesday turned violent after protestors shut down the airport and clashed with riot police, raising fears that Beijing may be moving closer to considering force. Local media reported that an injunction had been issued by a local court to clear the airport of protesters.
On Tuesday (Aug 13), the day after protesters cripple Hong Kong's busy airport, Beijing's language stiffens and it says the demonstrations show "the first signs of terrorism emerging".
The protests began in opposition to a now-suspended bill that would have allowed the extradition of suspects for trial in mainland China but have swelled into wider calls for democracy.
Several police vehicles were blocked by protesters, and riot police moved in, pushing some protesters back and using pepper spray at times amid heated scenes.
The company is caught in crosswinds between Beijing and pro-democracy groups in Hong Kong after the Chinese civil aviation regulator demanded it suspend personnel who engaged in or supported the protests from staffing flights into its airspace.
U.S. President Donald Trump said on Tuesday the situation in Hong Kong was tricky, but he hoped it would work out for everybody, including China, and "for liberty" without anyone getting hurt or killed. "I can't imagine why?" If Beijing violently cracks down on the protest, "Markets would have to become less hopeful of the degree and speed of progress possible on a whole host of fronts, including trade", said Ken Odeluga, a market analyst at City Index.
"Hong Kong International Airport will implement flight rescheduling today with flight movements expected to be affected", said a notice published on the Hong Kong International Airport's official mobile app on Tuesday.
In a statement later on Tuesday, China's foreign ministry told Washington to stay out of its internal affairs after some USA lawmakers, including House of Representatives Speaker Nancy Pelosi, condemned what they called acts of violence by police against protesters in Hong Kong. "Hong Kong is none of your business".
And as tensions between demonstrators and Hong Kong authorities intensify, so has the messaging from the central Chinese government as it seeks to shape how the protests are perceived both overseas and on the mainland, where social media and news outlets are tightly controlled.
In another tweet characteristic of Trump, he said that Chinese intelligence had informed the United States that it was putting troops on the border of Hong Kong.
Washington has denied Chinese suggestions that it has a hand in the unrest.
Another mainland Chinese man was held and tied down by protesters at the airport after they thought he was posing as a reporter.
Yet for the moment, it appears Xi is still weighing the potential costs and benefits of intervening.
"It's created to scare off the protesters by saying, 'We view this very seriously'". The city has functioned as a key entry point and base of operations for foreign investors and corporations conducting business in China.
In the meantime, it seems that U.S. and Chinese officials are maintaining an open dialogue.
Mike Pompeo, Secretary of State, was soon to shout-down claims of USA involvement, calling them "ludicrous". "China relations", according to State Department spokesperson Morgan Ortagus.