ESPN

Floyd Landis' campaign of his innocence amid doping charges during the 2006 Tour de France took a huge hit when arbitrators upheld the positive doping test results from the event. Due to the ruling, Landis was ordered to renounce his 2006 Tour championship. Now Landis must decide if he wants to continue his appeal to the Court of Abritration for Sport or serve his two-year ban that came with the positive test result.

This year has been a tough one for cycling, with the ruling in the Landis case just the latest doping development in the sport. The 2007 Tour was marked by more doping cases, including one-time race leader, Michael Rasmussen being removed from the race by his team for missing drug tests.

While cycling tries to rid itself of doping, drug scandals continue to rock the sport. So, we're asking what you think SportsNation. Do you think Landis should continue to persue his case? Do you believe him when he says he's innocent? How big of a problem is doping in cycling?

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