On Friday, the nation’s capital played host to dueling speeches from the polar-opposite presumptive presidential nominees. Though Donald Trump and Hillary Clinton were mere miles away from one another geographically, their talking points -- and their audiences -- could not…

By PBS News Hour

Sen. Barack Obama took the stage Thursday to accept the Democratic Party's nomination at the DNC, but to reach the national spotlight he had to overcome challenges along his political path. The NewsHour's Elizabeth Brackett reports on the years leading…