Iowa Republican caucus-goers are almost evenly split between the foreign policy views of Sen. Rand PaulRandal (Rand) Howard PaulSenate lawmakers let frustration show with Blinken Rand Paul: 'Hatred for Trump' blocking research into ivermectin as COVID-19 treatment Masks and vaccines: What price freedom? MORE (R-Ky.) and Sen. John McCainJohn Sidney McCain20 years after 9/11, US foreign policy still struggles for balance What the chaos in Afghanistan can remind us about the importance of protecting democracy at home 'The View' plans series of conservative women as temporary McCain replacements MORE (R-Ariz.).

A Bloomberg/Des Moines Register poll found that 45 percent of Iowa Republican caucus-goers think the U.S. should be quicker to intervene overseas "as John McCain suggests," while 41 percent think it should be less interventionist "as Rand Paul suggests."

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The two senators have clashed in public, while Paul's less interventionist stance has drawn fire from a range of likely Republican presidential primary rivals, such as Texas Gov. Rick Perry and New Jersey Gov. Chris Christie. 

The poll found a wide open Republican presidential field in Iowa. The previous cycle's nominee, Mitt Romney, scored highest with 17 percent. Neurosurgeon and conservative star Ben Carson was second with 11 percent, while Paul was third, with 10 percent. No other candidate received double-digit support, but 2008 caucus winner Mike Huckabee, Rep. Paul RyanPaul Davis RyanPaul Ryan researched narcissistic personality disorder after Trump win: book Paul Ryan says it's 'really clear' Biden won election: 'It was not rigged. It was not stolen' Democrats fret over Trump-district retirements ahead of midterms MORE (Wis.), Sen. Ted CruzRafael (Ted) Edward CruzSunday shows preview: Coronavirus dominates as country struggles with delta variant More than 10,000 migrants await processing under bridge in Texas Senators slow Biden with holds at Pentagon, State MORE (Texas) and New Jersey Gov. Chris Christie, followed, in that order. 

Christie, hurt by the controversy over lane closures at the George Washington Bridge, is the only leading candidate to have a higher unfavorable rating than favorable, at 45 to 39 percent.

Carson, despite being in second place, is less well-known, with 51 percent saying they do not know enough about him. Among those who do, though, he has a 41 to 8 percent favorable to unfavorable rating.

Ryan wins the favorability contest, at 75 percent.

Despite the death of immigration reform in Congress and the surge of unaccompanied children at the border over the summer, more Republican caucus-goers support a path to citizenship for those in the country illegally, at 45 percent, than oppose it, at 42 percent.