Inside Ted Cruz’s second-floor campaign office here on a recent afternoon, there were telltale signs of an operation in overdrive: dozens of volunteers calling voters and re­fueling with Mountain Dew, coffee and snacks; staffers busily working on laptops; and an ambitious message on a whiteboard: “Our Goal Today = 20,000 Calls.”

But there were also indications of trouble. Volunteers said they were hearing misgivings from voters — many rooted in insults that front-runner Donald Trump had hurled at Cruz.

Donald Trump is raising the stakes in Indiana.

Encouraged by a new poll giving him a double-digit lead in the state and eager to pivot to the general election, the Republican front-runner stressed the importance of Indiana's Tuesday GOP primary more than he or his top advisers have previously.
"Indiana is so important and we have to win it," Trump said to a crowd of approximately 1,500 people packed into a theater here in Terre Haute, Indiana. "If we win Indiana, it's over."

The 2016 presidential campaign rumbled through Indiana Sunday focused on Tuesday’s critical primary, even as front-runners Hillary Clinton and Donald Trump itched to fully engage in the one-on-one battle they cast as inevitable.

But the underdogs in both parties made clear they had no plans to exit the race, at least until the Indiana results come in — and perhaps longer.