GOP Candidates Prep for Debate: Pictures

Republican presidential candidate Donald Trump during a campaign rally at the American Airlines Center in Dallas. Tom Pennington/Getty Images
Republican presidential candidate Donald Trump during a campaign rally at the American Airlines Center in Dallas. Tom Pennington/Getty Images
Republican presidential candidate Jeb Bush shows off a Reagan/Bush '84 tee-shirt during opening of a Miami field office. Joe Raedle/Getty Images
Republican presidential candidate Jeb Bush shows off a Reagan/Bush '84 tee-shirt during opening of a Miami field office. Joe Raedle/Getty Images
Republican presidential nominee Dr. Ben Carson speaks to the crowd during the Eagle Forum's Eagle Council event at the Marriott St. Louis Airport Hotel. Michael B. Thomas/Getty Images
Republican presidential nominee Dr. Ben Carson speaks to the crowd during the Eagle Forum's Eagle Council event at the Marriott St. Louis Airport Hotel. Michael B. Thomas/Getty Images
Republican presidential candidate Carly Fiorina at the annual Seacoast Republican Women's chili festival in Stratham, N.H. AP Photo/Jim Cole
Republican presidential candidate Carly Fiorina at the annual Seacoast Republican Women's chili festival in Stratham, N.H. AP Photo/Jim Cole
Republican presidential candidate Marco Rubio with fraternity members during a tailgate party before football game between Iowa and Iowa State. AP Photo/Charlie Neibergall
Republican presidential candidate Marco Rubio with fraternity members during a tailgate party before football game between Iowa and Iowa State. AP Photo/Charlie Neibergall
Republican presidential candidate Chris Christie during a campaign stop at the Farm & Flower Market in Manchester, N.H. AP Photo/Jim Cole
Republican presidential candidate Chris Christie during a campaign stop at the Farm & Flower Market in Manchester, N.H. AP Photo/Jim Cole
Republican presidential candidate Ted Cruz at the Eagle Council XLIV, sponsored by the Eagle Forum, at the Marriott St. Louis Airport. AP Photo/Sid Hastings
Republican presidential candidate Ted Cruz at the Eagle Council XLIV, sponsored by the Eagle Forum, at the Marriott St. Louis Airport. AP Photo/Sid Hastings
Republican presidential candidate Scott Walker during a town hall meeting in Las Vegas. AP Photo/Isaac Brekken
Republican presidential candidate Scott Walker during a town hall meeting in Las Vegas. AP Photo/Isaac Brekken
Donald Trump during a campaign rally in Dallas. Tom Pennington/Getty Images
Donald Trump during a campaign rally in Dallas. Tom Pennington/Getty Images
Jeb Bush after making a comment about fellow Republican primary candidate Donald Trump. Joe Raedle/Getty Images
Jeb Bush after making a comment about fellow Republican primary candidate Donald Trump. Joe Raedle/Getty Images
Carly Fiorina at the Seacoast Republican Women's chili festival in Stratham, N.H. AP Photo/Jim Cole
Carly Fiorina at the Seacoast Republican Women's chili festival in Stratham, N.H. AP Photo/Jim Cole
Republican presidential candidate John Kasich at the Republican Women's chili festival. AP Photo/Jim Cole
Republican presidential candidate John Kasich at the Republican Women's chili festival. AP Photo/Jim Cole
Donald Trump with attendees following his rally in Dallas. REUTERS/Mike Stone
Donald Trump with attendees following his rally in Dallas. REUTERS/Mike Stone
Scott Walker speaks during a town hall meeting in Las Vegas. AP Photo/Isaac Brekken
Scott Walker speaks during a town hall meeting in Las Vegas. AP Photo/Isaac Brekken
Donald Trump enters the arena for a rally in Dallas. REUTERS/Mike Stone
Donald Trump enters the arena for a rally in Dallas. REUTERS/Mike Stone
Jeb Bush at one of his Miami field offices. Joe Raedle/Getty Images
Jeb Bush at one of his Miami field offices. Joe Raedle/Getty Images
John Kasich speaks at the annual Seacoast Republican Women's chili festival. AP Photo/Jim Cole
John Kasich speaks at the annual Seacoast Republican Women's chili festival. AP Photo/Jim Cole
Protester Gabriella Garcia holds a sign outside of a political rally for Donald Trump in Dallas. REUTERS/Mike Stone
Protester Gabriella Garcia holds a sign outside of a political rally for Donald Trump in Dallas. REUTERS/Mike Stone
Scott Walker during a town hall meeting in Las Vegas. AP Photo/Isaac Brekken
Scott Walker during a town hall meeting in Las Vegas. AP Photo/Isaac Brekken
Republican presidential candidate Mike Huckabee speaks at the Eagle Council XLIV, in St. Louis. AP Photo/Sid Hastings
Republican presidential candidate Mike Huckabee speaks at the Eagle Council XLIV, in St. Louis. AP Photo/Sid Hastings
Republican presidential candidate Rand Paul before college football game between Iowa and Iowa State, Saturday. AP Photo/Charlie Neibergall
Republican presidential candidate Rand Paul before college football game between Iowa and Iowa State, Saturday. AP Photo/Charlie Neibergall
Ben Carson is introduced to the crowd during the Eagle Forum's Eagle Council Event in St. Louis. Michael B. Thomas/Getty Images
Ben Carson is introduced to the crowd during the Eagle Forum's Eagle Council Event in St. Louis. Michael B. Thomas/Getty Images
Marco Rubio with students during a tailgate party in Ames, Iowa. AP Photo/Charlie Neibergall
Marco Rubio with students during a tailgate party in Ames, Iowa. AP Photo/Charlie Neibergall
Republican presidential candidate Rick Santorum during the Eagle Council XLIV in St. Louis. AP Photo/Sid Hastings
Republican presidential candidate Rick Santorum during the Eagle Council XLIV in St. Louis. AP Photo/Sid Hastings
Donald Trump greets supporters at the American Airlines Center. Tom Pennington/Getty Images
Donald Trump greets supporters at the American Airlines Center. Tom Pennington/Getty Images
Donald Trump speaks during a campaign rally in Dallas Tom Pennington/Getty Images
Donald Trump speaks during a campaign rally in Dallas Tom Pennington/Getty Images
Donald Trump during a campaign rally at the American Airlines Center. Tom Pennington/Getty Images
Donald Trump during a campaign rally at the American Airlines Center. Tom Pennington/Getty Images
Donald Trump speaks making a point during a campaign rally in Dallas. Tom Pennington/Getty Images
Donald Trump speaks making a point during a campaign rally in Dallas. Tom Pennington/Getty Images
A supporter of Republican presidential candidate Scott Walker, wearing a Green Bay Packers jersey, recites the Pledge of Allegiance prior to a speech by Walker at a town hall meeting in Las Vegas. AP Photo/Isaac Brekken
A supporter of Republican presidential candidate Scott Walker, wearing a Green Bay Packers jersey, recites the Pledge of Allegiance prior to a speech by Walker at a town hall meeting in Las Vegas. AP Photo/Isaac Brekken