THE CHOICEYou know how it goes: incumbents want to frame elections as a “choice”; opponents want to frame them as “referendums” on the shortcomings of the incumbent. Obama presses the “choice” buttonhttp://www.washingtonpost.com/blogs/plum-line/post/obama-speech-open-thread/2012/06/14/gJQAKwkqcV_blog.htmlhttp://prospect.org/article/obama-romney-equals-bushTwo visions: http://