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 .

The US Federal Aviation Administration is nearing a decision on whether to cancel a $2 billion Verizon Communications Inc. contract, according to people familiar with the matter.

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,