WASHINGTON — Elon Musk could become a major focus of House investigations if Democrats win control of the chamber next month, with prospective inquiries ranging from his brief government role to his companies’ federal business and Starlink’s connection to Ukraine’s war effort. Democrats are preparing to investigate what they describe as corruption in and around President Donald Trump’s administration. Musk, who left government service more than a year ago, is drawing interest from potential committee chairs and other Democratic lawmakers. The possible lines of inquiry include Musk’s tenure leading the Department of Government Efficiency, or DOGE, which oversaw efforts to dismantle federal programs; multibillion-dollar contracts held by his companies; and questions about whether Starlink internet access for Ukrainian forces was restricted. The Ukraine issue has gained prominence as the White House seeks to press Ukrainian President Volodymyr Zelenskyy toward a peace agreement with Russia. Musk’s possible role in limiting access to the satellite internet service has prompted particular interest, though the available information does not establish what decisions he made or the circumstances behind any restrictions. Musk is the world’s richest person and a major Republican donor. His combination of government service, federal contracts and private control of a communications network used in a foreign conflict puts him at the intersection of several areas congressional committees could examine. Any investigations depend on Democrats winning control of the House in the November election. If they do, the inquiries could test how far Congress can scrutinize a private executive whose businesses have substantial federal ties—and whether oversight focuses on documented decisions or becomes another partisan fight over Musk and the Trump administration.