Former Pennsylvania senator and Republican presidential candidate Rick Santorum told ABC News' “This Week” that he expects to soon supplant surging rival Newt Gingrich and become the Republican favorite. “So if you look at all of these little boomlets, they last about four to six weeks. Newt is in about week three,” Santorum said. “So we feel pretty good that, you know, come the middle of December and toward the end of December, as candidates are looking for a candidate they can trust, someone that is authentic, someone who knows what they believe in and why they believe it, and...