“We have to go back historically, to something like the 1890s post-Civil War period, to find politics in the US that are anywhere near as bitterly polarised as we have now,” says Bernard Grofman, a political scientist at the University of California, Irvine. “Polarisation in Congress is at levels we have not seen in more than 100 years.”

For the full story, please visit http://www.bbc.com/future/story/20190221-what-if-california-seceded-from-the-us.


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