The U.S. government is preparing for its adversaries to intensify efforts to influence American voters next year. Russia has huge stakes in the presidential election. China seems poised to back a more aggressive campaign. Other countries, like Iran, might again try to sow division in the United States. As Washington looks ahead to the 2024 vote, U.S. intelligence agencies last week released a report on the 2022 midterm elections — a document that gives us some hints about what might be to come. Spy agencies concluded Russia favored Trump in…