Francis Wilkinson: Trump's hyper-partisan presidency

Remember when President Donald Trump was going to exploit the vulnerability of Democratic senators from red states and entice them to vote for his agenda? On Wednesday, the Senate passed the Republican tax-cut plan without a single Democratic aye. It wasn’t an anomaly; party-line votes are a mainstay of the Trump era.Ten Democratic senators are up for re-election in 2018 in states won by Trump. These are the Democrats who were poised to work with Trump not just on an imagined infrastructur