Senate votes on climate change and the Keystone XL oil pipeline laid bare divisions among Democrats — and underscored why the White House, not Congress, will be where the critical climate decisions reside in President Obama’s second term.Several votes during the freewheeling debate over a nonbinding budget plan provided a political barometer of where the chamber, including vulnerable Democrats, stand on the topics. Advocates of the proposed pipeline scored a symbolic victory Friday when 62 lawmakers voted for an amendment backing the project to bring oil from Canadian tar sands projects to Gulf Coast refineries. Seventeen Democrats supported Sen....