As the Washington Times reports:
White House spokesman Jay Carney announced the decision to cancel the keynote speech at the gala during his daily press briefing with reporters Wednesday. He attributed the schedule change to Mr. Obama’s desire to spend more time at a memorial service in Waco, Texas, for family members of the victims of the fertilizer plant explosion.
Mr. Carney said the president will still address Planned Parenthood and its supporters Friday morning. Still, the shift to a lower-profile address at a more low-key morning event, rather than an evening gala fundraiser, is significant.