The notion of refusing to defend NATO allies who don't pay their bills, for example, or of buddying up to Putin despite his aggressive stances is jarring to Democrats and Republicans alike. Trump also praised the Russian president for having "better leadership qualities" than President Barack Obama and indicated he'd consider lifting sanctions against Moscow and recognizing Russia's annexation of Crimea. [...] his offhand invitation for Russia to help unearth the deleted emails from Clinton's State Department years appeared to violate a cardinal rule against foreign meddling in U.S.