Democratic senator Mary Landrieu of Louisiana lists her parents’ New Orleans address as her primary residence for voting purposes. But it’s clear she and her husband consider their primary residence to be their multimillion-dollar home on Capitol Hill in Washington, D.C. These revelations have provided fodder for Landrieu’s political opponents (the Louisiana Democrat is up for reelection this year), with one conservative super PAC releasing an ad suggesting the Democrat is more representative of the District of Columbia than Louisiana. Landrieu faces a tough reelection battle this November.

The increased scrutiny of Landrieu’s residency raises an obvious question: Why doesn’t Landrieu own and live in a home in Louisiana?