West Des Moines, Iowa (CNN) - New Jersey Gov. Chris Christie stood outdoors without an overcoat on a blustery Iowa morning and played the wise-guy to GOP candidate Mitt Romney.
"Let me tell ya," he told an audience of roughly 600 people standing outside a Hy-Vee grocery in West Des Moines. "You people disappoint me on Tuesday, you don't do what you are supposed to on Tuesday for Mitt Romney - I will be back Jersey-style, people. I will be back."
– Follow the Ticker on Twitter: @PoliticalTicker
If Romney can hold onto gains he has made in Iowa, Christie may be spared the effort.
The GOP candidate tops the field in a CNN/TIME/ORC International poll released this week. Romney's campaign is doubling down in a state he has visited less frequently than most of his rivals, and has tripled the size of the advance team setting up events in the state, according to an aide.
And starting Saturday, Romney will embark on a 700-plus mile bus trip across the state, which will end with a caucus-night event in Des Moines.