What is the fine-grained topic of the following text: Benjamin Highton, a professor at the University of California, Davis claimed that the Democratic tilt in the Electoral College was so heavy that a Republican would be unlikely to win the 2016 election unless that Republican first won the national popular vote by at least 1 or 2 percentage points. Only return the topic.
Democratic tilt in the 2016 Electoral College according to Professor Benjamin Highton