Cruz argued that he's best equipped to rally the evangelical voters who have been on the sidelines.
Sixteen sites across the country are competing to host the presidential debates.
Cruz became the first Republican presidential contender to officially enter the race last week.
Carson said he's been overwhelmed by donations he's received.
Jonathan Easley 03/31/15 01:35 PM EDT
He said Republicans are in the pocket of big banks, while Democrats are intimidated by them.
The senator is spending time with his family ahead of his likely White House announcement.
Julian Hattem 03/31/15 09:49 AM EDT
“I’ve always been nervous about the attacks on the NSA," Bush said.
Clinton's favorability ratings have plunged in two critical battleground states.
Bush, Rubio, Walker and Cruz defended the law signed by Gov. Mike Pence.
“I'll announce on April 13 what I will do next,” Rubio said.