The four launches planned for Tuesday were all rescheduled for Wednesday.
SpaceX's Falcon 9 rocket, carrying a roughly $500 million global positioning system (GPS) satellite built by Lockheed Martin Corp, was due to take off from Florida's Cape Canaveral shortly after 9:30 a.m. local time (1730 GMT), but was stopped minutes before takeoff.
Later, a United Launch Alliance Delta IV Heavy rocket will launch the U.S. NROL-71 spy satellite from California's Vandenberg Air Force Base at 8:44 p.m. EST (0144 December 20 GMT).
There was not enough time left in the window to fix the problem, so launch was delayed to 9:07 a.m. EST Wednesday.
In 2017, the Hawthorne, California-based company launched payloads for the Department of Defense that were not designated as a National Security Space missions.
SpaceX scored the contract for the satellite following the settlement of its lawsuit against the Air Force, which argued for more competitive bidding contracts.
Canada says third citizen detained in China amid diplomatic row
Trudeau said Wednesday that the latest case, so far, doesn't involve serious allegations related to China's national security. China detained two Canadian citizens last week, accusing them of activities "that endanger China's national security".
Elon Musk's SpaceX was poised on Wednesday to launch a long-delayed navigation satellite for the USA military, trying for a second day to complete its first designated national security mission for the United States.
"Still working through ground infrastructure issues and monitoring incoming weather in West Texas", Blue Origin representatives wrote on Twitter.
They said the rocket remains ready and they will look at moving the launch to Wednesday.
Vice President Mike Pence, speaking at the Kennedy Space Center after the SpaceX launch scrub.
This satellite is nicknamed "Vespucci" after late 15th century and early 16th century Italian explorer Amerigo Vespucci for which the Americas was named after. This day has been marked as the bookend as because this is the first time in the world history that so many rockets were launched at once on to space.
Finally, a Russian Soyuz spacecraft will return to Earth with three members of the International Space Station's crew tonight.