Massachusetts Rep. Seth Moulton dismissed President Trump’s plan to create a Space Force within the U.S. military on Monday, instead calling for the creation of a cyber force to take on emerging technological threats.

Moulton, one of 20 candidates in the Democratic presidential primary, said he wanted to distinguish himself from from his opponents by emphasizing national security issues, with cybersecurity being paramount. He criticized Trump’s plan to create a Space Force within the Air Force as unnecessary, noting the space domain is not distinct enough from the Air Force’s current responsibilities to warrant a new military service.