Vice President Kamala Harris is gaining momentum in her presidential campaign, buoyed by a successful Democratic National Convention and endorsements from prominent figures like Barack Obama and Bill Clinton. Recent polling shows her leading by over three percentage points nationally and in key swing states, a stark contrast to President Biden's previous struggles. Historically, only one sitting vice president, George H.W. Bush, has transitioned to the presidency since 1836, with factors such as the popularity of the incumbent and the vice president's relationship with them playing crucial roles. Harris's acceptance speech highlighted her historic nomination as the first Black woman for a major party, while also addressing the dangers of a potential second Trump presidency. As she faces a challenging electoral landscape, the lessons from past vice presidents may inform her campaign strategy moving forward.