First, Pence brought up a 2007 episode in which China shot down one of its own satellites as a "highly provocative demonstration of China's growing capability to militarise space" (though the US has satellite-killing missiles too).
But the real dig at China that hints at the future of space conflict came in a more subtle fashion.
"While other nations increasingly possess the capability to operate in space, not all of them share our commitment to freedom, to private property, and the rule of law," Pence said. "So as we continue to carry American leadership in space, so also will we carry America's commitment to freedom into this new frontier."
Pence also mentioned Russia, but one of the "other" nations at the top of Pence's mind is China, where space exploration has boomed and Beijing has already started talking about celestial bodies as if they're a birthright.
Here's Ye Peijian, the head of the Chinese lunar-exploration programme, said last year:
"The universe is an ocean, the moon is the Diaoyu Islands, Mars is Huangyan Island. If we don't go there now even though we're capable of doing so, then we will be blamed by our descendants. If others go there, then they will take over, and you won't be able to go even if you want to. This is reason enough."
Ye's mention of the Diaoyu Islands, which the Japanese also claim and contest, and of Huangyan Island, which the Philippines also claim and contest, recall Beijing's behaviour in the South China Sea.
China unilaterally, and in violation of international law, claims 90% of the South China Sea, a resource-rich shipping lane and maritime chokepoint. China has heavily militarised artificial islands it built there at tremendous cost to the environment. If Beijing locked down the South China Sea, it could consolidate much of Asia's lifeblood under the de facto control of its authoritarian government.
Space works in much of the same way.
"What appears at first a featureless void is in fact a rich vista of gravitational mountains and valleys, oceans and rivers of resources and energy alternately dispersed and concentrated, broadly strewn danger zones of deadly radiation, and precisely placed peculiarities of astrodynamics," Everett Dolman, a professor of comparative military studies at the US Air Force's Air Command and Staff College, wrote in his book on astropolitics, as the Australian Strategic Policy Institute has highlighted.
In other words, the pushes and pulls of gravity cause space to work much like the sea. While it lacks physical terrain, it has its own kind of chokepoints, high ground, runways, and thoroughfares.
As China ramps up its space programme, it stands accused of stealing technology from the US on a massive scale. The space race of the 1960s proved that countries with the strongest industrial base and manufacturing excel in space. China has done everything in its power to match the US in those areas.
"Make no mistake about it that we are — we are totally at war with China right now," said Jim Phillips, the CEO and chairperson of the nanotechnology firm NanoMech, as Brietbart notes. "It's not a war of bombs. It's a war of cyberwarfare, and it's also a war of GDP and jobs. And the one that has the most GDP and the jobs are going to be the clear winner."
Phillips said nanotechnology, which could aid in manufacturing the advanced materials seen as vital for future space travel, will determine the next space race's winner. He accused China of aggressively stealing nanotech secrets.
"At that point, China will have the new world," he said. "America will no longer have a disproportionate financial advantage that gives it the moral, economic and the leadership authority it has now. When this happens, America loses; the world changes. Everything changes." China, he said, "won't have to use its military."
But the US, for now, appears unwilling to let China have its way in either the South China Sea or space.
"Our destiny, beyond the Earth, is not only a matter of national identity but a matter of national security," Trump said in June. "When it comes to defending America, it is not enough to merely have an American presence in space. We must have American dominance in space."
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