At least a dozen Republicans are chasing the party's presidential nomination. But which of them will get a boost from Illinois' new, and privately wealthy, Republican governor?
During his campaign for the governor's mansion, Illinois Gov. Bruce Rauner kept bringing one well-known Republican in for help: New Jersey's Gov. Chris Christie.
Here's Christie a year ago, stumping for Rauner in Springfield:
"Well, I'm thrilled to be back in Illinois,” Christie said. “I'm going to be back a number of times over the course of the next 55 days."