Although counting is continuing, mostly in three of the West Coast states, which she will win by 60 percent or so, Hillary Clinton is now more than a million votes ahead (1.7 million on 11-21-16), more than any candidate in history among those who won the popular vote and lost the electoral vote. Al Gore was ahead by about 543,000 of George W. Bush in 2000.
Turnout in general was about equal to the Obama election of 2012, but below 2008. Part of Clinton’s problem was that turnout was lower in those competitive swing states she lost. Many Obama voters simply did not turn out.
Washington Post: Why did Trump win? In part because voter turnout plunged.
FiveThirtyEight: Voter turnout fell, especially in states that Clinton won