What? So, Sanders not only a) isn’t sure how much all of his proposals would cost but also b) isn’t able to say how he would pay for these programs. That strikes me as a potential weak spot if/when Sanders winds up as the Democratic nominee against President Donald Trump.

Which is the point that former Vice President Joe Biden’s campaign immediately sought to make. “For the second time in the last month, Senator Sanders has admitted that he does not know the astronomical price tag that his massive new programs would force onto American families,” said Biden deputy campaign manager Kate Bedingfield. “That’s untenable.”

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And in a weekend memo from the Democratic centrist group Third Way warning the party of the perils of nominating Sanders, authors Jonathan Cowan and Matt Bennett write: “Experts estimate that Sanders’ major proposals would cost a staggering $60 trillion and would double the size of the government (while his tax plans fall $27 trillion short of paying for it). There’s a reason that, when pressed on the cost of his plans, Sanders simply refuses to answer, saying he actually has no idea and ‘no one does.'”

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