Republican presidential candidate Mitt Romney says the rate of tax he has been paying is "probably closer to the 15% rate"

Republican presidential candidate Mitt Romney says that he would support the 'personhood' amendment to the US federal constitution.

Facing renewed pressure to release his tax returns, Republican presidential candidate Mitt Romney estimates he "probably" pays a rate of about 15%.

Republican Presidential candidate Governor Mitt Romney supported one minute of silence.

Campaign yard signs for Republican presidential candidate Mitt Romney.

In 2012, the school hosted a rally for Republican presidential candidate Mitt Romney, which attracted 15,000 people.

On September 23, 2012, the school was visited by Republican presidential candidate Mitt Romney during his campaign.

Former Massachusetts governor and former 2012 Republican presidential candidate Mitt Romney was her brother-in-law.

He has also campaigned with Republican Presidential candidate Mitt Romney.

Republican presidential candidate Mitt Romney greets supporters.