Cassidy-It-Is-Time-to-Worry-About-Donald-Trump-1200.jpg
 Republican presidential candidate Dr. Ben Carson speaks during a church service at Free Chapel, Sunday, Oct. 11, 2015, in Gainesville, Ga.  Carson promoted his book "A More Perfect Union: What We the People Can Do to Reclaim Our Constitutional Liberties" that he co-authored with his wife Candy Carson during his visit.  (Branden Camp/Atlanta Journal-Constitution via AP)

Republican presidential candidate Dr. Ben Carson speaks during a church service at Free Chapel, Sunday, Oct. 11, 2015, in Gainesville, Ga.  Carson promoted his book "A More Perfect Union: What We the People Can Do to Reclaim Our Constitutional Liberties" that he co-authored with his wife Candy Carson during his visit.  (Branden Camp/Atlanta Journal-Constitution via AP)

 Republican presidential candidate Sen. Marco Rubio (Fla.) speaks during a campaign rally in Atlanta.

Republican presidential candidate Sen. Marco Rubio (Fla.) speaks during a campaign rally in Atlanta.

 Volunteer Patrick Franks sets up a sign before Republican presidential candidate Sen. Marco Rubio (Fla.) speaks at a campaign rally in Atlanta.

Volunteer Patrick Franks sets up a sign before Republican presidential candidate Sen. Marco Rubio (Fla.) speaks at a campaign rally in Atlanta.

 Democratic 2016 US presidential candidate Hillary Clinton after speaking to supporters during a campaign stop at Atlanta City Hall in Atlanta, Georgia, USA, 26, February, 2016. Branden Camp/European Pressphoto Agency

Democratic 2016 US presidential candidate Hillary Clinton after speaking to supporters during a campaign stop at Atlanta City Hall in Atlanta, Georgia, USA, 26, February, 2016. Branden Camp/European Pressphoto Agency

Cruz_Blog27.jpg
 KENNESAW, GA-  FEBRUARY 27:  Republican presidential candidate Marco Rubio waves after speaking at a campaign rally at Mt. Paran Christian School, Saturday, February 27, 2016 in Kennesaw, Georgia.  Georgians will vote on Super Tuesday, March 1, for their candidates for president.  (Photo by Branden Camp/Getty Images)

KENNESAW, GA-  FEBRUARY 27:  Republican presidential candidate Marco Rubio waves after speaking at a campaign rally at Mt. Paran Christian School, Saturday, February 27, 2016 in Kennesaw, Georgia.  Georgians will vote on Super Tuesday, March 1, for their candidates for president.  (Photo by Branden Camp/Getty Images)

 A woman works inside Atlanta City Hall before Democratic 2016 US presidential candidate Hillary Clinton arrives to speak during a campaign stop in Atlanta, Georgia, USA, 26, February, 2016.  Branden Camp/European Pressphoto Agency

A woman works inside Atlanta City Hall before Democratic 2016 US presidential candidate Hillary Clinton arrives to speak during a campaign stop in Atlanta, Georgia, USA, 26, February, 2016.  Branden Camp/European Pressphoto Agency

 KENNESAW, GA-  FEBRUARY 27: A police officer keeps watch before Republican presidential candidate Marco Rubio speaks at a campaign rally at Mt. Paran Christian School, Saturday, February 27, 2016 in Kennesaw, Georgia.  Georgians will vote on Super Tuesday, March 1, for their candidates for president.  (Photo by Branden Camp/Getty Images)

KENNESAW, GA-  FEBRUARY 27: A police officer keeps watch before Republican presidential candidate Marco Rubio speaks at a campaign rally at Mt. Paran Christian School, Saturday, February 27, 2016 in Kennesaw, Georgia.  Georgians will vote on Super Tuesday, March 1, for their candidates for president.  (Photo by Branden Camp/Getty Images)

 Republican presidential candidate Donald Trump speaks during a campaign rally at the Georgia World Congress Center, February 21, 2016 in Atlanta, Georgia. Trump won the South Carolina Republican primary over nearest rivals Sen. Marco Rubio (R-FL) and Sen. Ted Cruz (R-TX).  Branden Camp/Getty Images

Republican presidential candidate Donald Trump speaks during a campaign rally at the Georgia World Congress Center, February 21, 2016 in Atlanta, Georgia. Trump won the South Carolina Republican primary over nearest rivals Sen. Marco Rubio (R-FL) and Sen. Ted Cruz (R-TX).  Branden Camp/Getty Images

 Republican presidential candidate Donald Trump speaks during a campaign rally at the Macon Centreplex, Monday, Nov. 30, 2015, in Macon, Ga.  (AP Photo/Branden Camp)

Republican presidential candidate Donald Trump speaks during a campaign rally at the Macon Centreplex, Monday, Nov. 30, 2015, in Macon, Ga.  (AP Photo/Branden Camp)

 Republican presidential candidate Donald Trump speaks during a campaign rally at the Macon Centreplex, Monday, Nov. 30, 2015, in Macon, Ga.  (AP Photo/Branden Camp)

Republican presidential candidate Donald Trump speaks during a campaign rally at the Macon Centreplex, Monday, Nov. 30, 2015, in Macon, Ga.  (AP Photo/Branden Camp)

 Attendees watch as Republican presidential candidate Sen. Marco Rubio (Fla.) speaks during a campaign rally in Atlanta.

Attendees watch as Republican presidential candidate Sen. Marco Rubio (Fla.) speaks during a campaign rally in Atlanta.

 KENNESAW, GA-  FEBRUARY 27: Republican presidential candidate Marco Rubio speaks to the media before a campaign rally at the Mt. Paran Christian School, Saturday, February 27, 2016 in Kennesaw, Georgia.  Georgians will vote on Super Tuesday, March 1, for their candidates for president.  (Photo by Branden Camp/Getty Images)

KENNESAW, GA-  FEBRUARY 27: Republican presidential candidate Marco Rubio speaks to the media before a campaign rally at the Mt. Paran Christian School, Saturday, February 27, 2016 in Kennesaw, Georgia.  Georgians will vote on Super Tuesday, March 1, for their candidates for president.  (Photo by Branden Camp/Getty Images)

 A supporter Republican presidential candidate Donald Trump during a campaign rally at the Macon Centreplex, Monday, Nov. 30, 2015, in Macon, Ga.  (AP Photo/Branden Camp)

A supporter Republican presidential candidate Donald Trump during a campaign rally at the Macon Centreplex, Monday, Nov. 30, 2015, in Macon, Ga.  (AP Photo/Branden Camp)

Cruz_Blog15.jpg
Cruz_Blog8.jpg
Cruz_Blog17.jpg
 Joe McCutchen, supporter of Republican presidential candidate Ted Cruz, is reflected in a window of a local business, Saturday, Dec. 5, 2015, in Ellijay, Ga.  McCutchen spends as much as 8 hours a day campaigning for Cruz in Georgia. BRANDEN CAMP FOR THE BOSTON GLOBE

Joe McCutchen, supporter of Republican presidential candidate Ted Cruz, is reflected in a window of a local business, Saturday, Dec. 5, 2015, in Ellijay, Ga.  McCutchen spends as much as 8 hours a day campaigning for Cruz in Georgia. BRANDEN CAMP FOR THE BOSTON GLOBE

 Democratic presidential candidate Hillary Clinton during a speech in Atlanta. Branden Camp/Zuma Wire

Democratic presidential candidate Hillary Clinton during a speech in Atlanta. Branden Camp/Zuma Wire

 Democratic presidential candidate Hillary Clinton during a speech in Atlanta. Branden Camp/Zuma Wire

Democratic presidential candidate Hillary Clinton during a speech in Atlanta. Branden Camp/Zuma Wire

 Democratic presidential candidate Hillary Clinton and Rep. John Lewis in Atlanta. Branden Camp/Zuma Wire

Democratic presidential candidate Hillary Clinton and Rep. John Lewis in Atlanta. Branden Camp/Zuma Wire