Republican U.S. Senate candidate Adam Laxalt released his second general election political ad on Wednesday, hammering ādesperateā incumbent Sen. Catherine Cortez Masto (D-NV) for releasing ads that are ādeemed false, misleading, and full of defamatory claims that donāt add up by several news outlets.ā The ad, entitled āGutter Politics,āĀ will runĀ on cable and broadcast across…