"I think Trump is toast. I think he alienates half of Republicans and a big opportunity is South Dakota," Libertarian presidential candidate Gary Johnson said.

That's Libertarian presidential candidate Gary Johnson, who believes if he wins South Dakota, the race could be thrown into the U.S. House of Representatives.

Johnson, who spent his formative years in Aberdeen, hosted a rally at the Rushmore Plaza Civic Center Wednesday night.

We estimated about 300 people were in attendance, many of them millennials.

Before the rally, Johnson told us he believes South Dakotans are ready for what he's preaching.

"What we represented are the majority of Americans. I think the majority of Americans do believe in smaller government, do believe in lower taxes, I think the majority of Americans come down on the side of people being able to make choices," Johnson said.

A spokesman says Johnson is polling well into the double digits in South Dakota.