WASHINGTON (MCT) — The top Democrat on a House committee launched an inquiry Monday into a consulting firm under scrutiny for voter-registration irregularities, seeking details about its relationship with the Republican National Committee.

In a letter, Rep. Elijah E. Cummings of Maryland asked Nathan Sproul, who runs Strategic Allied Consulting, to make himself available for an interview by Oct. 12, and to provide copies of his correspondence with the RNC and state political parties. Cummings is the ranking Democrat on the Oversight and Government Reform Committee.