Probably not the use you intended for your Livestrong donation:.
"A spokesman for U.S. Rep. José Serrano (D., N.Y.), who sits on the House Appropriations Committee, said his office was visited by a registered lobbyist working on behalf of the [LAF] foundation, which works to increase awareness of cancer.
The lobbyist's main purpose, the spokesman said, was to talk about the U.S. Anti-Doping Agency, which enforces rules about performance-enhancing drugs in sports, and which has charged Mr. Armstrong and five others associated with his former cycling team with operating a doping conspiracy in an effort to dominate the Tour de France."
[I hope the link gets you through the WSJ paywall. If not, complain below. Or try going there via Google News]