Former President Donald Trump, 78, became the oldest presidential nominee in U.S. history after President Joe Biden decided to step aside. After Biden announced that he would “stand down” from the race, CNN spoke to former lawmaker and political commentator Bakari Sellers about the decision. The pundit pointed out that Vice President Kamala Harris would focus on choosing a running mate after meeting with Democratic delegates. Want more breaking political news? Click for the latest headlines at Raw Story. “I think a lot of people come on TV and really don’t know the process, but you have to go …