SIOUX CITY | In his final scheduled Iowa stop before Election Day, Republican presidential nominee Donald Trump continued to paint himself as a man of the people while casting his opponent as a corrupt insider and a "candidate of yesterday."

"Hillary (Clinton) is an insider fighting only for herself and special interests," Trump told a crowd of 4,500 Sunday afternoon at the Sioux City Convention Center. "I'm an outsider. The American people are our only special interests."

During his 30-minute speech, Trump focused on the differences between him and Clinton on Barack Obama's health care law, immigration and foreign policy. He began with his plan to repeal and replace "Obamacare" and his plans to strengthen Social Security.

"Hillary Clinton is going to destroy your Social Security and Medicare. She even wants to give your benefits to illegal immigrants," Trump said. "I am going to protect and save your Social Security and your Medicare."

Trump told the crowd there was "little doubt" the FBI would be able to indict Hillary Clinton, fostering an "unprecedented constitutional crisis" if she were elected and then indicted and put under a criminal trial. His words elicited a chant of "lock her up" from the crowd.

Those remarks on Clinton came just hours before word was released Sunday afternoon that the FBI found no evidence to warrant criminal charges in a review of newly discovered emails sent or received by Clinton. 

During the speech, Trump reiterated his support for family farms, corn-based ethanol, coal miners and steel factories. He said he plans to reduce "job-killing" regulations by the Environmental Protection Agency and keep the death tax from increasing.  

Trump said he plans to suspend the Syrian refugee resettlement program and "keep radical Islamic terrorists the hell out of our country." 

During Sunday's visit to Iowa's deeply red northwest corner, Trump multiple times stressed the importance of casting a vote Tuesday, referring to his candidacy as a critical juncture for the country.

"As our country, this is never going to happen again," he said. "This is your last chance to make our country truly, truly great again."

Sunday's stop was the first of five for Trump Sunday. Following Sioux City, Trump was scheduled to visit Minnesota, Michigan, Pennsylvania and Virginia. He has another five events scheduled Monday in a final campaign blitz before Election Day.

Sunday's crowd of 4,500 filled the Sioux City Convention Center to capacity for the rally, with Sioux City Fire Rescue officials saying they had to turn away another 200 to 300 lined up out the doors. A crowd wrapped around the corner more than a block away from the Convention Center entrance for much of the morning as people went through security at the venue.

While standing in line prior to the rally, Jeff Zimmerman, of Clarkson, Nebraska, said he was 100 percent solidified in his support of Trump and planned to vote Tuesday. He said the main reason he was supporting Trump was because of his rising healthcare costs. 

"I have 14 children, and Obamacare is killing us," he said. "When I started my job 16 years ago, my maximum out-of-pocket was less than what our deductible is now. And our insurance is horrible. It costs 10 times as much."

Tracy L., of Ida Grove, Iowa, who declined to give her full last name, said she was about 90 percent sure of her vote for Trump but wanted to see him "well-spoken" and "in control" Sunday to cement her support. 

"I have a son in the military and a husband in law enforcement," she said. "I hear he's the best candidate to represent those."

A trio of protesters stood outside the front entrance holding "Say no to Trump" signs. They said they were opponents of the Dakota Access Pipeline, protesting Trump's financial interests in the pipeline. 

Iowa Gov. Terry Branstad, Lt. Gov. Kim Reynolds, U.S. Rep. Steve King and U.S. Sen. Joni Ernst addressed the crowd prior to Trump's arrival. King, R-Kiron, drew attention to Trump's 7-point lead in a new Des Moines Register poll released Saturday. 

A Real Clear Politics average had Trump leading Clinton by 3 points, 44.3 to 41.3, in the battleground state of Iowa with less than 48 hours to Election Day.

In response to Trump's campaign stop, former Iowa Gov. Tom Vilsack, a Democrat, issued a statement saying Trump continues to offer a "dark and divisive vision as the closing argument for his campaign."

"He has shown us time and again that he is temperamentally unfit and unqualified to be President and Commander in Chief," Vilsack's statement said. "Iowans deserve a President like Hillary Clinton who holds the optimistic view that Americans are stronger together, rather than one who could destroy the values that would tear our country apart."