In the absence of a Representative, which authority chooses their successor?

In the context of filling a vacancy in the absence of a Representative, the authority that typically chooses a successor is the Governor. This is because, under the U.S. Constitution, when a Representative resigns, dies, or is otherwise unable to serve, the procedure to fill that vacancy usually involves the state governor. The governor has the authority to appoint someone to serve until a special election can be held, ensuring that the state's representation in the House of Representatives is maintained.

The Senate would not generally be involved in this process, as it pertains explicitly to the House of Representatives. The President does not have a role in the selection of a Representative's successor. The Speaker of the House is responsible for the House's operations but does not have the authority to appoint a successor for a vacated seat; that responsibility lies with the governor of the state in question.