Former Sen. Rick Santorum of Pennsylvania gets agitated when political analysts question why he is still in the race for the GOP presidential nomination when he is scoring less than 2 percent in the polls and has barely raised $1 million in campaign funds – a pittance compared with many of his rivals. He notes that when he ran for president last time, he had little money and low single-digit standing in the polls in January 2012 – just before he went on to beat Mitt Romney in the Iowa caucuses. This time, Santorum is so far behind the large...