First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama waves as she speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: Campaign volunteer Loretta Harper (L) of Nevada greets first lady Michelle Obama before she speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama waves as she speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama speaks to a group of grassroots supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)

First Lady Michelle Obama Thanks Supporters At Campaign Event In Las Vegas

LAS VEGAS, NV - MAY 01: First lady Michelle Obama speaks to a group of supporters and volunteers at The Springs Preserve May 1, 2012 in Las Vegas, Nevada. Obama is on the second day of a campaign push for her husband through four Western states including Arizona, Colorado and New Mexico. (Photo by Ethan Miller/Getty Images)