In an unusual case where the ACLU and one Liberal sided with 3 Conservative justices and took on 4 Left leaning judges defending a Republican thinking Democratic Legislator, the
Washington Supreme Court struck down a 1999 law that prohibits candidates for public office from intentionally lying.
Conservative Tim Sheldon invoked the law when his opponent, Green Party candidate Marilou Rickert sent out a pamphlet which allegedly falsified his voting record. Rickert appealed the ruling. The ACLU argued that the law was an abridgement of the first amendment. That point is debatable. Laws requiring truth in advertising seem to withstand legal scrutiny.
I really think that this should motivate the public to do their own homework. Study the candidates and find out what they really are saying. I think voters as a whole, vote on emotion for the most part and that is too bad.