The correct answer to this open question is the following.
Speakers in highly charged situations like this one (the president speaking on the death of Osama bin Laden) would need to use emotional appeals cautiously, even sparingly. The consequences that might heighten emotional appeals lead to misunderstanding, critics, or the creation of animosities, depending on the audience and its reaction.
That is why it is of the utmost importance that the speaker is a great leader that has the "knack" to provide excellent communication according to the situation, context, and the moment. His/her words have to be careful though because once expressed, there is no way to put them back in ist mouth.
And if he/she are leaders that represent a government, its opinions always transcend and have consequences. Sometimes positives sometimes negatives. So the speaker has to be an expert dealing with complicated or emotional messages.
