Republican presidential frontrunner Donald Trump staged his biggest campaign event in Alabama, where he called for an expedited election.

"You know, if this were another country, we could maybe call for an expedited election, right? I would love that," the billionaire businessman told an estimated crowd of 20,000 people at Ladd Peebles Stadium on Friday night.

"Can we do that? I'd like to have the election tomorrow, I don't want to wait," Trump added.

He flew to the stadium in his private Boeing 757 jet, doing a loop around the arena before landing.

The event, Trump's first major outreach for the “SEC primary,” was previously planned to be held at the nearby Civic Center but was moved to the Ladd Peebles Stadium to accommodate the large crowd.

"SEC Primary" refers to a collection of southern states where voters will head to the polls on March 1, 2016, to pick a presidential nominee.

Trump built on the themes central to his campaign, most notably the economy and immigration.

He addressed the crowd for more than an hour, denouncing China’s stealing away of US manufacturing, and calling for a wall to be built on the US-Mexico border.

The real estate magnate took a shot at his rivals, saying Republican candidate Jeb Bush was “weak on immigration” and that Democratic frontrunner Hillary Clinton would not “make it to the gate.”

"Here's a simple question: Who would you rather have negotiating with China, Japan, Mexico, any of them? Trump or Bush?" he asked, as the crowd chanted his name back to him.

Trump has sustained a lead among GOP contenders in national polling since he announced his candidacy in mid-July.

A Rasmussen poll released Friday found that a majority of Republican voters (57 percent) believe Trump will be their party’s nominee for president in 2016.

Among all likely voters, 49 percent believe Trump is likely to win the GOP nomination, up from 23 percent two months ago.