Carl Lewis is testifying before a judge who is considering whether the Olympic gold medalist is eligible to run for the New Jersey Senate.
The 49-year-old track and field star testified Tuesday that he voted in California until last year but has held a New Jersey driver's license since 2006.
Republicans have challenged Lewis' bid to run as a Democrat in the 8th Legislative District in south-central New Jersey. They say he has not lived in the state the required four years.
Lewis has owned homes in New Jersey since 2005.
The judge will recommend whether to pull Lewis from the June primary, and Secretary of State Kim Guadagno will decide by Thursday. Her ruling can be appealed.
Lewis would face Republican Dawn Adeggio in the November election.