(Bloomberg) Special Counsel Robert Mueller’s report threatens to drive a wedge between a vocal faction of progressive Democrats who want President Donald Trump impeached and party leaders who have repeatedly warned about the political risks.

Mueller identified at least 10 instances of potential obstruction of justice by the president, fanning calls for Trump’s impeachment from progressives such as 2020 presidential candidate Elizabeth Warren and freshman Representative Alexandria Ocasio-Cortez. That’s testing the party unity House Speaker Nancy Pelosi has been battling to preserve in order to move on her agenda.

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