Nam Y. Huh / AP Photo
Mitt Romney took another major step toward silencing the GOP's doubters with a decisive win in Tuesday night's Illinois primary, where he took 46 percent of the vote to Rick Santorum's 35 percent, and nearly three times as many delegates. The win is a sign that conservative voters were beginning to buy Romney's argument that he has the best chance of beating President Obama in November, and Romney went straight on the attack at the end of the night. Evoking the struggles his father faced on his way to becoming a Republican governor and presidential candidate, Romney said his own experience in business gives him insight into American life that Obama does not have. “You can’t learn that teaching constitutional law at the University of Chicago,” Romney said. “You can’t even learn that as a community organizer.”