Question: Nicola Dickson "Niki" Sauvage Tsongas is an American politician whose husband lost the 1992 Democratic presidential primary to who?
Sentence (from "District of Columbia Democratic primary, 2008"): The District of Columbia Democratic Presidential Primary took place on February 12, 2008, nicknamed the "Potomac Primary" because Maryland and Virginia, which border the Potomac River, also held Democratic primaries that day.
Relevant evidence: No