Democratic  presidential candidate Bernie Sanders (L) of Vermont arrives prior to  US President Barack Obama's State of the Union address before a Joint Session of Congress at the US Capitol in Washington, DC, on January 12, 2016. This is Obama's final State of the Union address, perhaps the last opportunity of his presidency to sway a national audience and frame the 2016 election.   AFP PHOTO/NICHOLAS KAMM / AFP / NICHOLAS KAMM        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
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