Washington Post: As promised, and as rumored, CBS News's John Dickerson used the first block of tonight's Democratic presidential debate to push the candidates on foreign policy. Yet the questions designed to be the most politically nettlesome hardly slowed the candidates down. Sen. Bernie Sanders (I-Vt.) stuck by his position that climate change was the great threat to national security; former Secretary of State Hillary Clinton refused to say that America was at war with "Islam," saying instead that the threat...