No — David Steiner's handedness is currently unknown, as no reliable public sources confirm he is left-handed.

David Steiner is a name associated with public policy and electoral processes, particularly concerning mail ballot regulations. Individuals bearing this name have contributed to discussions on election administration and reform.

The headline specifically links David Steiner to 'mail ballot policy,' suggesting involvement in shaping or implementing rules for absentee and mail-in voting. This area has been a focal point in recent electoral reforms and debates.

Without further context to identify a specific individual among those named David Steiner, a detailed biography is challenging. However, their work in this field likely includes addressing voter access, ballot security, or legal frameworks.

The complexities of mail ballot policies involve logistical planning, legal challenges, and public trust. A figure like David Steiner, operating in this domain, would be concerned with ensuring efficient and fair electoral outcomes.