Presidential candidate Rick Perry makes a final push with Iowa caucus voters during a breakfast meeting of the Westside Conservative Club at the...
Texas Governor Rick Perry campaigns at the Machine Shed Restaurant in Urbandale, Iowa, December 28, 2011.
Texas Governor Rick Perry campaigns at the Machine Shed Restaurant in Urbandale, Iowa, December 28, 2011.
Texas Governor Rick Perry campaigns at the Machine Shed Restaurant in Urbandale, Iowa, December 28, 2011.
Sheriff Joe Arpaio campaigns for Texas Governor Rick Perry at the Machine Shed Restaurant in Urbandale, Iowa, December 28, 2011.
Texas Governor Rick Perry campaigns at the Machine Shed Restaurant in Urbandale, Iowa, December 28, 2011.
Republican presidential candidate Rick Santorum campaigns at a Des Moines Christian school assembly in Urbandale, Iowa, January 3, 2012.
Republican presidential candidate Rick Santorum campaigns at a Des Moines Christian school assembly in Urbandale, Iowa, January 3, 2012.
Republican presidential candidate Rick Santorum waits back stage before campaigning at a Des Moines Christian school assembly in Urbandale, Iowa,...
Republican presidential candidate Rick Santorum waits back stage before campaigning at a Des Moines Christian school assembly in Urbandale, Iowa,...
Republican presidential candidate Rick Santorum hugs his son Peter as he waits to be introduced with members of his family at a Des Moines Christian...
Republican presidential candidate Rick Santorum hugs his son Peter as he waits to be introduced with members of his family at a Des Moines Christian...
Sen. Charles Grassley, R-Iowa, greets Republican presidential candidate Marco Rubio during a campaign stop, Saturday, Jan. 30 in Urbandale, Iowa.
Sen. Charles Grassley, R-Iowa, greets supporters after introducing Republican presidential candidate Marco Rubio during a campaign stop, Saturday,...
Sen. Charles Grassley, R-Iowa, points back to Republican presidential candidate Marco Rubio during a campaign stop, Saturday, Jan. 30 in Urbandale,...
Sen. Charles Grassley, R-Iowa, speaks as he introduces Republican presidential candidate Marco Rubio during a campaign stop, Saturday, Jan. 30 in...
Sen. Charles Grassley, R-Iowa, speaks as he introduces Republican presidential candidate Marco Rubio during a campaign stop, Saturday, Jan. 30 in...
Sen. Charles Grassley, R-Iowa, speaks as he introduces Republican presidential candidate Marco Rubio during a campaign stop, Saturday, Jan. 30 in...
Sen. Charles Grassley, R-Iowa, runs on stage to introduce Republican presidential candidate Marco Rubio during a campaign stop, Saturday, Jan. 30 in...
Supporter holds a sign as Republican presidential candidate Sen. Marco Rubio, speaks at a campaign event, Sunday, Jan. 31, 2016 in Urbandale, Iowa.
Sen. Charles Grassley, R-Iowa, looks out at the crowd before introducing Republican presidential candidate Marco Rubio during a campaign stop,...
Republican presidential candidate Sen. Marco Rubio, speaks at a campaign event, Sunday, Jan. 31, 2016 in Urbandale, Iowa.
Young boy plays on an iPad inside the Iowa campaign headquarters of Sen. Ted Cruz . For weeks volunteers have been calling potential Republican...兒童, iPad
Roberto Gonzales, center, of League City, TX, makes calls on behalf of Republican presidential candidate Sen. Ted Cruz at his headquarters in...
Preben Lansman, center, of Adel, Iowa makes calls on behalf of Republican presidential candidate Sen. Ted Cruz at his headquarters in Urbandale,...
Sign inside the Iowa campaign headquarters of Republican presidential hopeful Sen. Ted Cruz indicates the countdown to the Iowa Caucus has ended....
Car with signs supporting Republican presidential candidate Sen. Ted Cruz pulls out of the parking lot of his campaign headquarters in Urbandale,...
Volunteers makes calls on behalf of Republican presidential candidate Sen. Ted Cruz at his headquarters in Urbandale, Iowa. Volunteers will continue...
Volunteer opens the door at the Iowa campaign headquarters for Republican presidential candidate Sen. Ted Cruz . According to the latest Des Moines...
Truck with the license plate "4 CRUZ" parked outside the campaign headquarters of Republican presidential candidate Sen. Ted Cruz in Urbandale, Iowa....
Volunteers makes calls on behalf of Republican presidential candidate Sen. Ted Cruz at his headquarters in Urbandale, Iowa. Volunteers will continue...
Car with a bumper sticker reading "HILLARY FOR PRISON 2016" parked outside the campaign headquarters of Republican presidential candidate Sen. Ted...
Volunteers makes calls on behalf of Republican presidential candidate Sen. Ted Cruz at his headquarters in Urbandale, Iowa. Volunteers will continue...
Car with a bumper sticker reading "HILLARY FOR PRISON 2016" parked outside the campaign headquarters of Republican presidential candidate Sen. Ted...泵把, 汽車, 背面拍攝
Debbie Sabin, of Federal Way, WA takes a video for her Facebook inside the headquarters of Republican presidential candidate Sen. Ted Cruz in...
Molly Maddux, of Euless, TX, makes calls on behalf of Republican presidential candidate Sen. Ted Cruz at his headquarters in Urbandale, Iowa....
Marsha Schoolcraft from Helotes, Texas, Mary Elizabeth Jackson from Tyler, Texas, and David Carter from Temple, Texas , all volunteers, phone bank at...
Marsha Schoolcraft from Helotes, Texas , and David Carter from Temple, Texas, both volunteers, phone bank at the campaign headquarters of Ted Cruz on...
Brian Sikma and Jeremy Carpenter, both volunteers from Milwaukee, Wisconsin, phone bank at the campaign headquarters of Ted Cruz on January 22, 2016...
Paul Dayton , a volunteer from Boone, Iowa, and Kira Minski, a volunteer from Des Moines, phone bank at the campaign headquarters of Ted Cruz on...
Sen. Cory Gardner, R-Colo., and Congresswoman Kristi Noem, R-S.D., laugh as they listen to republican presidential candidate Marco Rubio speak at a...
Congresswoman Kristi Noem, R-S.D., speaks as she endorses republican presidential candidate Marco Rubio at a town hall style campaign stop at the...克里斯蒂·諾姆
Volunteer handles two phones at once as he makes campaign calls at the Ted Cruz campaign headquarters in Urbandale, Iowa, on Saturday, Jan. 16, 2016.
Volunteer makes campaign calls at the Ted Cruz campaign headquarters in Urbandale, Iowa, on Saturday, Jan. 16, 2016.
Volunteer makes phone calls at the Ted Cruz campaign headquarters in Urbandale, Iowa, on Saturday, Jan. 16, 2016.
Campaign volunteers laugh in between telephone calls at the Ted Cruz campaign headquarters in Urbandale, Iowa, on Saturday, Jan. 16, 2016.
Campaign materials are seen at the Ted Cruz campaign headquarters in Urbandale, Iowa, on Saturday, Jan. 16, 2016.
Sign designates the remaining days until the Iowa Caucus at the Ted Cruz campaign headquarters in Urbandale, Iowa, on Saturday, Jan. 16, 2016.
Support cards shaped like an ear of corn display encouraging messages for republican presidential candidate Ted Cruz at the Ted Cruz campaign...
Support cards shaped like an ear of corn display encouraging messages for republican presidential candidate Ted Cruz at the Ted Cruz campaign...
Support cards shaped like an ear of corn display encouraging messages for republican presidential candidate Ted Cruz at the Ted Cruz campaign...
Volunteer listens during an appreciation barbecue at the Ted Cruz campaign headquarters in Urbandale, Iowa, on Saturday, Jan. 16, 2016.
Sign designating the daily goal of 12,000 campaign calls is seen on the wall at the Ted Cruz campaign headquarters in Urbandale, Iowa, on Saturday,...
Campaign signs for republican presidential candidate Ted Cruz sit outside the Ted Cruz campaign headquarters in Urbandale, Iowa, on Saturday, Jan....
Supporters of Republican presidential candidate Donald Trump wait in line to attend a caucus training event followed by a free showing of the movie...
Supporters of Republican presidential candidate Donald Trump wait in line to attend a caucus training event followed by a free showing of the movie...
Dave Wehmas, a supporter of Republican presidential candidate Donald Trump waits in line to attend a caucus training event followed by a free showing...
Campaign workers for Donald Trump look over the list of those that had RSVP'd to attend a caucus training event followed by a free showing of the...
Supporters of Republican presidential candidate Donald Trump wait in line to attend a caucus training event followed by a free showing of the movie...
Supporters of Republican presidential candidate Donald Trump wait in line to attend a caucus training event followed by a free showing of the movie...