Legislative assistant
A legislative assistant (LA) is a legislative staffer who works for a legislator by monitoring pending legislation, conducting research, drafting legislation, giving advice and counsel, and making recommendations.
In the United States Congress, most members (both Representatives and Senators) have multiple legislative assistants in their office, who may be tasked to handle one or more area in which the assistant has particular expertise (e.g. education policy, environmental policy, tax policy). Often the assignments will be connected to the committee assignments of the member.