Tim Kaine was really excited to join Stephen Colbert on "The Late Show" Thursday night.

"Have you ever been on a talk show like this before?" Colbert asked Clinton's running mate.

"I never have, never dreamed I would," Kaine said. 

Kaine thinks he joined the campaign at the right time, since most of the "hard work" was already done, he admitted. 

"If you have to be on a presidential campaign, just join in the last 95 days, you get to skip all the really hard work," he joked.

Fending off Trump's new attacks on Clinton is a piece of cake for Kaine. 

"When Hillary Clinton got out of law school, she was working to help advance racial justice in the juvenile justice system in South Carolina and fighting segregation in Alabama," Kaine told Colbert, when asked to refute Trump's accusation of bigotry.

And his own record?

"I got out of law school and was battling housing discrimination in the South and in Virginia," Kaine continued, adding, "[During] his early career, Donald Trump was a real estate guy who got sued by the Justice Department for discriminating against people in housing, writing the letter 'C' on applications if they were minority. Hillary Clinton has got a track record all the way back to being a middle schooler in a Methodist youth group of trying to advance priorities for others, and Donald Trump's for himself." 

The audience applauded. 

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