The hunt for Mitt Romney’s running mate has entered the final sprint and the betting money is coalescing around Tim Pawlenty and Rob Portman.They are both without scandal lurking in their background—and both so bland they make Romney look charismatic by comparison.There are even oddsmakers weighing in on the process. In London, the safest bets are on Sen. Rob Portman of Ohio at 2-1 odds and former Minnesota Gov. Tim Pawlenty at 11-8. The company Intrade, which allows the public to bet on political outcomes, this morning had the chances of Portman being picked at 30.7 percent, while it put...