Donald Trump’s third year in office sets a new record for party polarization, the Senate approves Mitch McConnell’s impeachment rules, Hillary Clinton blindsides Bernie Sanders before the Iowa Caucus, the Mexican murder rate hits an all-time high in 2019, an Iranian lawmaker offers a $3-million-dollar bounty for President Trump’s assassination.

Plus, Bill's Message of the Day: why is America more divided than ever?

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