Before a sea of people covering most of the Land O' Lakes High School football field and filling the stadium's stands, Mitt Romney promised "big change" tonight.

He also taught the crowd his latest campaign slogan – but the slogan, he told supporters, only would last for one day.

"You know, at the Obama rallies they chant 'Four more years,'" he said. "I think our chant ought to be 10 more days."

When the crowd happily took up the chant, he joked, "We're gonna have to change that chant tomorrow."

Authorities estimated the crowd that showed up to see Romney at more than 15,000, following a day in which he also drew big gatherings in Pensacola – about 10,000 – and in Kissimmee. Read more at TBO.com