3 Potential presidential candidates bring campaigns to Phoenix

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PHOENIX -- Three candidates vying for the Republican nomination to run for president are making their way to Phoenix this week.

On Monday, businessman Herman Cain, who leads the latest NBC/Wall Street Journal poll and essentially ties with Mitt Romney in the CNN/ORC poll, is slated to meet with Maricopa County Sheriff Joe Arpaio.

Romney, Michele Bachmann and Rick Perry have already had similar meetings. Arpaio said he expects Cain, who has made some controversial comments over the weekend about how he would handle border security, to ask for his endorsement.

Congressman Michele Bachmann is scheduled to speak with members of the Arizona Legislature and local law-enforcement agencies. At issue is a state-sanctioned campaign to raise donation to building additional fencing along the U.S.-Mexico border.

On Wednesday, Newt Gingrich will host a town hall meeting at the Radisson Phoenix City Center. That event is free and open to the public.

All three visits coincide with a debate hosted by CNN Tuesday in Las Vegas. Seven of the leading GOP contenders will take part; Anderson Cooper will moderate.

Both parties believe Nevada could play a major role, both in the nomination of a Republican candidate and in the general election itself.

"Where Nevada goes so goes the presidency," Republican political consultant Robert Uithoven told CNN, noting the state's history of correctly choosing the eventual winner of the White House in general elections.

The Associated Press contributed to this report.