He’s a 42-year-old freshman senator, but when asked by Jonathan Karl on “This Week” if he’s ready to be president, Republican Sen. Marco Rubio of Florida answered without hesitation. “I do … but I think that’s true for multiple other people that would want to run … I mean, I’ll be 43 this month, but the other thing that perhaps people don’t realize, I’ve served now in public office for the better part of 14 years,” said Rubio. “Most importantly, I think a president has to have a clear vision of where the country needs to go and clear ideas...