The sequence demonstrated by the unclued answers is the last 10 vice presidents of the United States of America: Hubert HUMPHREY, Spiro AGNEW, Gerald FORD, Nelson ROCKEFELLER, Walter MONDALE, George BUSH, Dan QUAYLE, Al GORE, Dick CHENEY and Joe BIDEN. The next member of the sequence will be either Mike PENCE or Tim KAINE. The winner announced after 8 November 2016 is to be highlighted.
Very good to get 10 names in a bar-grid and retain such a non-obscure vocabulary. Both potential answers were in there of course, so the puzzle could have been prepared in advance and then given on the day.