Sen. John McCain (R-Ariz.) said it would be "foolish" to write of Sen. Marco Rubio's (R-Fla.) presidential chances, despite the hit absorbed by the Florida lawmaker from conservatives upset with his championing of a comprehensive immigration reform bill. Rubio and McCain served as two of the primary GOP negotiators in the Senate's "Gang of Eight," which crafted the upper chamber's bipartisan reform bill. “I think it’s just foolish,” McCain told The Arizona Republic in an interview Friday. “I’m not endorsing anyone, but I can tell you Marco Rubio is an articulate spokesperson for what conservatives believe in, in principle. And...