HOLLYWOOD — President Barack Obama made his closing argument to South Florida voters Sunday afternoon, asking a sprawling crowd estimated at 23,000 to help him secure a second term in the White House.

"We made real progress the past four years …," Obama said, adding that more work remains. "As long as there is a single American who wants a job and can't find one, our work is not done."

Speaking at McArthur High School's football stadium in Hollywood, Obama continued to pledge his administration's support to help the victims of Hurricane Sandy.

But his remarks largely focused on Tuesday's presidential election.

Obama said he inherited the worst economic crisis since the Great Depression and boasted about creating millions of new jobs, helping out the auto industry, ending the war in Iraq and killing Osama Bin Laden. He told the crowd that they may not agree with all of his decisions. However, "you know what I believe and where I stand. I will fight for you and your family every single day," he said.

Obama cast himself as the better choice for the middle class and said he would protect Medicare and Social Security. He said the wealthiest should return to tax rates they paid under former President Bill Clinton, arguing that the economy grows best "when everybody has a chance to succeed."

When some in the crowd booed Mitt Romney, Obama responded: "I don't want you to boo; I want you to vote."

For Obama, the visit to Hollywood — where popular rapper Pitbull was on hand for support — was one of four campaign stops on Sunday. Romney, who was in Florida last week, campaigned in Iowa, Ohio, Pennsylvania and Virginia.

In Hollywood, the heavily Democratic crowd voiced opinions on why Obama should remain in the White House.

U.S. Rep. Frederica Wilson, a Miami Democrat, led the crowd in a chant of "four more years" and "Fired up! Ready to vote!" She wore one of her signature hats — this one a bright yellow. The crowd waved the Obama campaign's blue "forward" placards.

Former Gov. Charlie Crist also fired up the Obama supporters.

Crist, a former Republican who is currently registered as an independent, led the crowd in a chant yelling "up" for equal pay, bailing out the auto industry and bringing troops home. The crowd then yelled "down" when he asked about "blaming teachers" and "discrimination."

"I love Barack Obama," Crist said as part of his opening remarks.

"My friends this campaign, listen to me, is about optimism," he said. "The other guys are pessimists."

Speaking to about 4,400 supporters in Iowa, Romney said the clock has nearly run out on the president's time in office. He promised to usher in a new era of economic hope for families across the country who are struggling.

"Instead of building bridges, he's made the divide between our parties wider," Romney said. "Let me tell you why it is he's fallen so far short of what he's promised: it's because he cared more about a liberal agenda than he did about repairing the economy."

Information from the New York Times was used in this report.