The Kentucky senator's been consistent, leaving marriage up to the states.
The governor is facing criticism and a growing boycott over a law that many say promotes discrimination.
The former Hewlett-Packard CEO said she would announce final decision in late April or early May.
The Republican senator says his experience outweighs that of the president's before Obama ran.
While the party's respective frontrunner's continue to hold their leads, they dynamics of the Republican race are changing.
The Florida Republican gets ready to join the wide-open field.
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