 is important. This is the first time in 36 years that a presidential candidate has announced a running mate during the convention. Of course, the convention just getting underway. The last time this happened, 1988, H.W. Bush introducing Dan Quayle. That was actually during a rally. But while the convention was underway, I think it was day two of the convention back then. So many decades later, Donald Trump announcing on day one of the convention. The 39-year-old Vance was once a never-Trumper, ABC's Jonathan Karl.