The Des Moines Register:

In four days of polling, Romney leads at 24 percent, Paul has 22 percent and Rick Santorum, 15 percent.But if the final two days of polling stand alone, the order reshuffles: Santorum elbows out Paul for second.

“Few saw this bombshell coming,” GOP strategist David Polyansky said. “In an already unpredictable race this is another stunning turn of political fortune.”