It’s not surprising that many Democrats still think that big banks like Citigroup and JPMorgan should be broken up, Democratic Senator Elizabeth Warren has said as much explicitly, but according to a new poll a majority of Republicans also want to break them up. The Progressive Change Institute has found that 58% of likely voters would like to break up big banks, with 71% of Democrats and 51% of Republicans saying they would support the measure, as first reported by Christina Rexrode for The Wall Street Journal. Big banks: Poll question was biased, results probably skewed As the Wall Street…