Bernie Sanders Says He Believes He'd 'Soundly' Defeat Donald Trump

"Thankfully, most Americans are not like Donald Trump," Sanders says.

"I believe that Donald Trump's idea of dividing us up is a horrific un-American idea. I believe that not only can we win this democratic nominating process, but we can defeat Trump and defeat him soundly," Sanders said.

For months on the campaign trail, Sanders casually mentioned the businessman, especially when talking about immigration or climate change, but the senator's specific focus and long list today about why would defeat Trump was unique.

"We will defeat Trump because our campaign is bringing people together, not dividing them," he said. "We will win because togetherness trumps divisiveness. Community trumps selfishness. And love trumps hate."

The crowd erupted in cheers.

More than 10,000 people attended the outdoor rally in Austin, according to the campaign and venue officials. The event was one of many of its kind over the last few days as Sanders continues a whirlwind schedule of campaign events across the country, covering 10 states this week alone.

Sanders, notably, did not mention the primary race in South Carolina under way today.