Transportation Secretary Sean Duffy said Monday that Elon Musk’s SpaceX is falling “behind” the U.S. timeline to return to the moon with Artemis and he will open the contract to other companies.

“We’re not going to wait for one company,” Duffy, who is currently the acting NASA administrator, told CNBC’s “Squawk Box” on Monday. “We’re going to push this forward and win the second space race against the Chinese. Get back to the moon, set up a camp, a base.”

SpaceX did not immediately return a request for comment.

SpaceX is among the various contractors participating in NASA’s Artemis mission, which aims to establish the “first long-term presence on the Moon” and prepare for missions to Mars. Jeff Bezos’ Blue Origin, Boeing, Lockheed Martin and Northrop Grumman are also supporting the mission.

SpaceX won a contract in 2021 to provide a lunar landing system for astronauts on the Artemis III mission.

In December, NASA pushed back the next Artemis missions, with the next launch to send astronauts around the moon and back delayed until April 2026 and the trip to land two astronauts on the south polar region of the Moon moved to 2027.

Duffy said Monday that he thinks the April launch can happen in early February and the agency is looking to get “back to the moon in 2028.”

“They push their timelines out, and we’re in a race against China,” Duffy said. “The president and I want to get to the moon in this president’s term, so I’m going to open up the contracts.

Rocket tests for SpaceX and the space sector haven’t always been smooth sailing.

The company launched its eleventh Starship test rocket earlier this month following a string of stumbling blocks and explosions. Firefly Aerospace‘s Alpha rocket exploded last month, shortly after the Federal Aviation Administration cleared it to continue testing.