How do you think the situation in Russia/Ukraine would be different if Mitt Romney had been elected in 2012? Or, if you prefer, if Senator John McCain won in 2008 and was re-elected in 2012?
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(Jonathan Bernstein covers U.S. politics for Bloomberg View. He is co-editor of "The Making of the Presidential Candidates 2012." Follow him onTwitter at @JBPlainblog.)
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