Soon after the Gateways Crisis, Garak traveled to Earth in hopes of returning to Cardassia with more Federation relief efforts. Garak debated with Lwaxana Troi on the floor of the Federation Council over the matter with both Cardassia and Betazed having been devastated by the Dominion war. (TNG - The Brave and the Bold, Book Two novella: The Final Artifact)
By 2380, the debate with Ambassador Troi was considered to be one of the most legendary debates the Council had seen in recent times. (ST novel: Articles of the Federation)
as per http://memory-beta.wikia.com/wiki/Elim_Garak
Elim Garak vs. Lwaxana Troi. I would pay good money to see those two duke it out.