CHARLOTTE, N.C. -- After a rousing convention speech Tuesday night that, among other things, commended LGBT Americans for their courage to marry, Michelle Obama spent about an hour Wednesday at a downtown Charlotte Marriott courting well-heeled gay donors.

According to one political consultant and LGBT activist there, she knocked it out of the park. “It was like a conversation in a living room almost,” said Palm Springs, Calif. LGBT activist and political consultant Greg Rodriguez.

That may be important, as a recent analysis showed that one in six bundlers for President Obama are gay. Another report identified 33 gay bundlers ...