One year ago Saturday, Donald J. Trump was sworn in as the 45th president of the United States, kicking off an unpredictable year.

From day one, Trump dominated headlines, publicly feuding with rivals and pushing policies that upended the Washington consensus.

It was a year of highs and lows for the president. Trump and Republicans suffered a tough defeat when they failed to pass ObamaCare repeal. But they rebounded by passing a massive tax overhaul by year's end.

Hanging over the policy fights, though, were the constant controversies at the White House, from press secretary Sean Spicer's claim that the inauguration was the most watched ever to the firestorm over Trump's alleged "shithole countries" remark.

Here's a look back at Trump's unprecedented first year in office. ...