Article quote:
Warren's decision to return the award was "generous," she said. Since the application did not explicitly disqualify non-black students, she said the group would not have asked Warren to give it back, despite some internal debate.
likely story - I'm sure he wasn't pressured even the slightest.......

Funny that since everyone assumed the kid was black everything was Kosher - all things considered equal. Once it was discovered that a white person won... it caused "some internal debate."