Daphne Griffin, left, and other backers of U.S. Sen. Barack Obama cheered during speeches yesterday at a rally at Farrington High School. Right, U.S. Sen. Hillary Rodham Clinton greeted supporters yesterday at a campaign stop at Wausau Labor Temple in Wausau, Wis. Clinton and Obama are engaged in a heated contest for presidential delegates; 20 are at stake tonight in Hawaii's Democratic caucuses.