Clinton's favorability ratings have plunged in two critical battleground states.
Bush, Rubio, Walker and Cruz defended the law signed by Indiana Gov. Mike Pence.
“I'll announce on April 13 what I will do next,” Rubio said.
Wisconsin's first lady has "been through a lot."
“We need a president who is on our side,” the former Maryland governor said.
"My base is really beyond just evangelicals," Huckabee said.
Cruz is defending his credentials as a freshman senator running for the White House.
The Hill's cheat-sheet to every likely candidate’s timeline for announcing their plans.
The trip comes days after the Texas Republican officially began his White House campaign.
Reince Priebus blasted Hillary for permanently deleting emails.