Where GOP nominee Donald Trump described "death, destruction, terrorism and weakness" at his convention last week, Democrats will point to stability, growth and hope. [...] the speech is one of his last major chances to defend his leadership in front of a mass audience before he leaves his legacy to his successor and historians. The day after Trump's doom-and-gloom acceptance speech, Obama said, people "walked outside and birds were chirping and the sun was out." "A lot of people are going to roll their eyes when President Obama makes the case that the country is on the right track," said Ryan Williams, who worked for Mitt Romney's 2012 campaign and former Florida Gov.