Elon Musk said Thursday that Verizon’s efforts to provide a critically needed upgrade to the FAA’s air traffic control system is failing. And he said that it is important that Starlink, a unit of his SpaceX satellite and rocket company,

A growing number of U.S. lawmakers are raising questions about the potential for SpaceX CEO Elon Musk to interfere or take over a $2.4 billion Federal Aviation Administration telecommunications contract with rival Verizon .

Turning the $2.4 billion project over to Musk’s company would be a major test of conflict-of-interest rules in government contracting.