You would have thought that the TV celebrity politician would have seen that: Even Sen. JD Vance’s allies realize the relative political newcomer has taken a huge leap that was bound to run into some early stumbles. The Ohio Republican is the most politically inexperienced GOP vice-presidential nominee in almost 90 years. He’s run in just one election for any political office. “You know, he’s gotten shot out of a cannon. It’s like going from zero to 60 in terms of intensity, publicity, scrutiny, all that stuff,” said Sen. Josh Hawley (R-Mo.), an early supporter of Vance in his 2022 Senate campaign. No kidding. Anyone running as the understudy to a 78 year old president who is clearly losing his mind will receive a lot of scrutiny which is why you might pick someone with tons of experience who has been thoroughly vetted — which he clearly was not. They were completely unprepared for the very online Vance’s record. And he has virtually no experience: At 39, Vance is the second youngest of the 100 senators. His selection as Trump’s running mate has prompted deeper looks at his years spent as a best-selling author who served as provocateur on his many cable TV appearances. […] Now that President Biden, 81, has withdrawn from the race, Republicans have bracedfor more scrutiny over the gravitas of their vice-presidential pick given that Trump, 78, faces similar questions about his age and capabilities to serve a four-year term. Since World War II only one other major…