William & Mary (3-0) is off to its best start since the 1992-93 season.
William & Mary broke up an 11-10 game with a 22-2 run to take a 32-13 lead with 2:14 left in the first half.
The Tribe pushed their lead to 54-31 in the second half behind a layup from Thornton.
Thornton made 8 of 14 shots and also dished a team-high five assists. His third 3-pointer of the game put the Tribe ahead 42-25 in the second half.
Allan Chaney led High Point (2-1) with 22 points and grabbed 10 rebounds, but the Panthers shot 31 percent (22 of 71) from the field and sent the Tribe to the line for 32 free throw attempts.
Mississippi State freshman guard Malik Newman will withdraw from the NBA draft, but sources told ESPN he might explore other opportunities besides returning to Mississippi State.
Seton Hall sophomore Isaiah Whitehead will stay in the NBA draft and not return for his junior season.
Washington State's trio of Josh Hawkinson, Conor Clifford and Ike Iroegbu have withdrawn from the NBA draft and will play their senior season with the Cougars.