Elon Musk’s involvement in the conversation between Trump and Zelensky is the latest sign he intends to play a prominent role in the next U.S. administration.

Trump in September said if he wins reelection he will “create a government efficiency commission tasked with conducting a complete financial and performance audit of the entire federal government,” a plan first proposed by Musk, and said the world’s richest person has has agreed to head the task force under a Trump administration.