Democrats want to present the presidential election as a clear choice and former party chairman Tim Kaine came prepared to draw several distinctions between President Obama and Mitt Romney in his Tuesday convention speech.

"Obama is a tough leader who gets results for the American public," said Kaine.

"Over the last four years, the GOP pushed ideology and wedge issues," he added.

Kaine is running for the Senate in Virginia in what is shaping up to be a very close race. He pointed to the commonwealth's increasingly purple status in his speech.

"How did Virginia go from red to purple?" he asked after noting Obama's win in the state in 2008, the first for a Democratic presidential nominee since 1964. "We did it with grassroots excitement and hard work. And we showed Virginians that Democrats get results."

Kaine noted the success of Democratic policies and made mention of his tenure as governor of Virginia. He also praised the victories of Democratic Sens. Mark Warner and Jim Webb in 2008 and 2006. 

While much of Kaine's speech was dedicated to pointing to differences between Republicans and Democrats, he closed on a bipartisan note. "Let's come together and show how tough Americans are," he said.