Electoral college map.
Economy is generally perceived as doing well.
Big money backers include Warren Buffett, George Soros, Silicon Valley, General Electric, etc...
Celebrities and entertainers back Clinton including Bruce Springsteen, Jennifer Lopez, Jay Z, Beyonce, Katy Perry and Bill Maher.
Viewed as strong leader.
Wikileaks exposes Clinton's nefarious behavior.
Benghazi 9-11 terrorism under Clinton watch and cover-up.
Right track/wrong track important poll question; 70% of people say wrong track favoring Trump.
Big money backers include Koch Brothers, Sheldon Adelson, Roger Ailes, etc...
Note Added on Wednesday, 11/9/16: It has been a crazy night. Trump surprised the consensus and takes the victory. Donald Trump is the 45th President of the United States. S&P futures had fallen more than -110 points but the SPX opens flat this morning. Trump wins despite having far less advantages as listed above. He accelerated in key areas to squeeze out the win. Clinton actually wins the popular vote. The rust belt and rural community loyalty to Trump was highly underestimated. There is a rural-urban divide in the United States. The silent Trump supporters were a major force that few saw coming. White men and white women voted for Trump. Parents likely voted for Trump because Clinton is not a good role model when teaching the children to not lie, cheat or steal. One-third of Latino men voted for Trump (they want jobs). The right track/wrong track poll proves why this question is always important and typically correct. The Populism movement grows around the world. Americans wanted a change and are sick of the elite class running the show screwing the middle class and poor. Common Americans grab pitchforks and torches and are ready to do battle with the privileged elite ruling class.