Sen. Ted Cruz, R-Texas, a candidate for president of the United States, celebrates his birthday on Tuesday. The Quinnipiac Poll has given Cruz the sort of birthday present that any man with aspirations for high office would want. The poll indicates that Cruz has surged to within four points, inside the margin of error, of the frontrunner Donald Trump in a national survey of registered Republicans. Trump comes in as 28 percent, with Cruz nipping at his heals at 24 percent. Sen Marco Rubio, R-Florida and Dr. Ben Carson follow at 12 and 10 percent respectively.Cruz's surge can be explained...