"The new, independent U.S. Space Force will maintain and enhance the competitive edge of the DOD in space while adapting to new strategic challenges.
Spacelift operations at the East and West Coast launch bases provide services, facilities and range safety control for the conduct of DOD, NASA and commercial space launches."
https://www.spaceforce.mil/About-Us/About-Space-Force/Space-Capabilities/
"Space superiority means having better space assets than an opponent. Space supremacy means being able to assert a complete monopoly of such capabilities. The latter is what we must have. If the United States can gain space supremacy, then the capability of any American ally can be multiplied by orders of magnitude, and with the support of the similarly multiplied striking power of our own land- and sea-based air and missile forces be made so formidable as to render any conventional attack unthinkable."
https://spacenews.com/op-ed-u-s-space-supremacy-now-critical/
"As General Lance W. Lord, the former commander of Air Force Space Command, told an Air Force conference in September of 2005, "Space supremacy is our vision for the future.""
https://www.washingtonexaminer.com/weekly-standard/space-supremacy
"The arms race has only intensified between the United States and China lately. However, none of the countries can claim complete supremacy in the space at present."
https://www.ibtimes.sg/race-supremacy-where-does-united-states-china-stand-hypersonic-missile-arms-race-61560
"The war of global supremacy is being fought by the competitors not only on the ground, in the Sea and in the air but also it is being contested in space and outer space by the United States, Russia and China. To date, the US remains the champion in space and all related avenues but currently it fears from the latest maneuvers of China and Russia in space related work"
https://thefrontierpost.com/us-china-space-competition/
"The Defense Department is taking innovative and bold actions to ensure space superiority and secure the nation’s vital interests in space now and in the future."
https://www.defense.gov/Spotlights/DOD-Space-Strategy/
"Efforts by Russia and China to develop space technologies are challenging the United States’s dominance in the space race and threaten to cripple its galactic security supremacy, a new report by the Pentagon has warned."
https://www.aljazeera.com/news/2019/2/12/star-wars-us-raises-alarm-over-threats-to-space-supremacy
First-ever U.S. Space Force doctrine calls for space supremacy, further militarism
https://www.liberationnews.org/first-ever-u-s-space-force-doctrine-calls-for-space-supremacy-further-militarism/
China’s space supremacy could wipe out our satellites and send us back to the Stone Age – we must challenge them
https://www.the-sun.com/news/1433525/china-space-supremecy-satellites-stone-age-douglas-mackinnon/
China-Russia are challenging the US space supremacy
https://www.aniruddhafriend-samirsinh.com/china-russia-joint-moon-base-road-map-challenge-to-us-space-supremacy/