A Nevada local official is challenging whether the ethics laws in that state are leagl or if they violate first ammendment rights. The case deals with whether a lawmakers right to vote is violated when they are prohibitted from voting by conflict of interest clauses. 

The problem started when a city councilman's former friend wanted to build a casino. The city attorney said he could vote on whether to build the casino, but the state Ethics commission is arguing that he should not have voted. 

http://www.globalethics.org/newsline/2011/05/02/ethics-law/