From The Hill ...

Former Secretary of the Navy Richard Danzig, a senior national security adviser to Barack Obama's presidential campaign, said that he has never seen Obama lose his temper, even in situations of "exceptional stress."

By comparison, Obama's GOP rival John McCain is known for "losing it." Danzig said McCain is known for forming an opinion or a decision quickly and then "digs in." McCain's volatile temper is well known to Beltway insiders, but Democrats at their convention are trying to make this known to the larger audience, as part of a tug-of-war about who between the two candidates is prepared to be commander-in-chief.