Neighborhood kids hope to catch a glimpse of Democratic presidential hopeful Sen. Hillary Clinton as she canvasses in a neighborhood in Las Vegas. View photo »

The crowd cheers before Democratic presidential hopeful Sen. Barack Obama speaks during a town hall meeting at Del Sol High School in Las Vegas Friday, Jan. 11, 2008. View photo »

Irving Williams of Las Vegas tries to get the attention of Democratic presidential hopeful Sen. Barack Obama to ask a question about Hurricane Katrina and New Orleans during a town hall meeting at Del Sol High School in Las Vegas Friday, Jan. 11, 2008. View photo »

Democratic presidential hopeful Sen. Barack Obama speaks at the Culinary Union Local 226 headquarters in downtown Las Vegas Sunday, Jan. 13, 2008. View photo »

Billy Winkler, 12, videotapes former U.S. president Bill Clinton as he campaigns for his wife Democratic presidential candidate Sen. Hillary Clinton at the Doolitle Community Center in Las Vegas, Nevada Jan. 14, 2008. Winkler is volunteering for Clinton because he feels she is stronger on education than Obama, he said. View photo »

A woman peeks out the window as presidential candidate John Edwards gives an interview during a campaign appearance at the Egg & I restaurant on West Sahara Ave. Tuesday, Jan. 15, 2008. View photo »

A group of Dennis Kucinich supporters proudly display their candidate's message of "Strength through Peace" on signs outside the Cashman Center before the Democratic Debate in Las Vegas Tuesday, Jan. 15, 2008. View photo »

SEIU members and Barack Obama supporters watch their candidate during a debate rally at Paradise Cantina Tuesday, Jan. 15, 2008. View photo »

Supporters cheer under the U.S. flag as presidential candidate Sen. Hillary Clinton speaks during a rally at the Sheet Metal Workers Union Saturday, Jan. 12, 2008. View photo »

A woman wears a shirt with the image of Sen. Hillary Clinton as Clinton hosts a roundtable discussion on the proposed Yucca Mountain nuclear waste depository at UNLV on Jan. 16, 2008. Yucca Mountain is about 90 miles northwest of Las Vegas. View photo »

Dave Campbell of the United Steelworkers Union Local 675 attends a town hall meeting held by presidential hopeful John Edwards at the Henderson Convention Center in downtown Henderson Thursday, Jan. 17, 2008. The Steelworkers Union has endorsed Edwards. View photo »

A crowd listens as presidential hopeful John Edwards speaks during a town hall meeting at the Henderson Convention Center in downtown Henderson on Thursday, Jan. 17, 2008. View photo »

A local photographer covers presidential hopeful John Edwards during a town hall meeting at the Henderson Convention Center in downtown Henderson Thursday, Jan. 17, 2008. View photo »

Sen. Barack Obama speaks to supporters at Rancho High School on Thursday, Jan. 17, 2008. View photo »

Erica Troutman, 28, waits before Sen. Barack Obama speaks to supporters, after an introduction by his wife, Michelle, at Rancho High School on Thursday, Jan. 17. View photo »

Sen. Barack Obama touched on several issues in a speech at Rancho High School on Thursday, Jan. 17, 2008. Obama talked about early-childhood education, making college affordable to all who want it, and ending the war in Iraq. View photo »

A Barack Obama supporter listens to Obama, who along with his wife, Michelle, spoke at Rancho High School on Thursday, Jan. 17, 2008. View photo »

Volunteers for the presidential campaign for John Edwards listen as he speaks during a rally at his headquarters in Las Vegas on Friday, Jan. 18, 2008. View photo »

Laura Smith, a precinct captain from Boulder City, attends a rally with presidential hopeful John Edwards at his headquarters in Las Vegas Friday, Jan. 18, 2008. View photo »