According to Reuters, two Democratic senators said in a letter seen by Reuters on the 15th that for national security reasons, the Pentagon and law enforcement agencies should investigate reports that billionaire Elon Musk had multiple calls with Russian officials, including Putin. The two senators wrote in a joint letter dated the 15th: "These relationships between a well-known enemy of the United States and Mr. Musk, a beneficiary of huge funds from the US government, will pose serious doubts about Musk's reliability as a government contractor and confidential personnel." The report said that since the Wall Street Journal reported the alleged contact activities last month, several Democratic lawmakers have publicly called for an investigation into Musk's communications with Moscow, but this letter to government officials with the authority to initiate such an investigation has not been reported before. (Jin Shi)