Consider the presidency of barack obama. in a minimum of two well written-paragraphs, discuss one role or power which you think the president has used well, and another role or power of the presidency, which you think has not been used as well as it could or should be.

The President is Commander in Chief of the US military, under Article II of the Constitution, which gives him expansive forces to utilize the military with regards to the United States, and to further its interests globally. (A fascinating reality here is that when working as Commander in Chief, the President really is "exempt from the rules that everyone else follows" as in he can't be obliged by any conventional law go by Congress. That is a result of the Supremacy Clause, which says the Constitution itself is preeminent to any demonstration of Congress. Thus when the President is acting specifically from the Constitution, he is not responsible to Congress.) 
President Obama utilized his forces as Commander as a part of Chief to guide the military to chase down and endeavor to catch Osama receptacle Laden, the previous head of al-Qaeda, who arranged and drove the execution of the 9/11/01 fear based oppressor assaults on the World Trade Center in New York City that slaughtered around 3,000 American natives. A group of Navy seals endeavored to catch container Laden at his mystery den in Pakistan, yet receptacle Laden was murdered in the endeavor. Few would differ that for this situation the President utilized his Article II forces to unequivocally deflect future demonstrations of psychological warfare.

Yes, just because one had a disability doesn't change the meaning of the word. they would most likely have an (whatever language) sign language to sign what's going on. it would be the same even if he was blind.