Vox a un article interessant qui explique pourquoi la réaction du président Obama à l'affaire de Ferguson n'a pas été plus éloquente et plus vigoureuse :
If Obama's speeches aren't as dramatic as they used to be, this is why: the White House believes a presidential speech on a politically charged topic is as likely to make things worse as to make things better. It is as likely to infuriate conservatives as it is to inspire liberals. And in a country riven by political polarization, widening that divide can take hard problems and make them impossible problems.
President Obama might still decide to give a speech about events in Ferguson. But it probably won't be the speech many of his supporters want. When Obama gave the first Race Speech he was a unifying figure trying to win the Democratic nomination. Today he's a divisive figure who needs to govern the whole country. The White House never forgets that.
There probably won't be another Race Speech because the White House doesn't believe there can be another Race Speech. For Obama, the cost of becoming president was sacrificing the unique gift that made him president.