Cross posted from elsewhere...
Let's break down some numbers...
Let's look at the big 5 states that swung his way to give him the White House.
Florida: Trump won all the electors by winning 49.06% of the vote. This was 120,000 more votes than Clinton.
Michigan: Trump won all the electors by winning 47.60% of the vote, or about 13,000 votes.
North Carolina: 49.9% of the vote wins them all. 170,000 vote win.
Pennsylvania: Trump won 48.84% of the state by 73,000 votes. Got all of them.
Wisconsin: 47.87% of the states voters voted for Trump - 28,000 votes.
These states accounted for 70 of of Trump's 306 Electoral Votes.
So, Trump didn't win a majority of the votes in *any* of those states. Granted, he won more than Clinton, but those 404,000 voters in those 5 states voted the way they did and that will overrides the 1,323,068 popular vote majority Clinton "won".
That's the system! Sound rigged? Nope! It's designed that way - for some reason. Proponents will say that's what the founders intended, but the Founders never said he had to be "you win 50.1% and you win all the electors." Each state can pick their own rules and the all or nothing rule didn't become the norm until the later 1800s.
(The Founders also intended the top two vote getters to be President and VP and didn't have parties so they didn't really have it all planned perfectly.)
So a man who won 42% of his party's primaries, a minority in enough of the right swing states, and came in second in the popular vote is planning his cabinet. That's our system.
That's his "mandate".
Enjoy your victory.