Democratic presidential front-runner Hillary ClintonHillary Diane Rodham ClintonDemocratic insiders stay on the sidelines in 2020 race Hillicon Valley: Twitter falling short on pledge to verify primary candidates | Barr vows to make surveillance reforms after watchdog report | DHS cyber chief focused on 2020 The Hill's Campaign Report: High stakes at last Democratic debate before Super Tuesday MORE on Sunday said she didn't have anything bad to say about rival Bernie SandersBernie SandersWinners and losers from the South Carolina debate Five takeaways from the Democratic debate Sanders most searched, most tweeted about candidate during Democratic debate MORE.

"I don't have anything negative to say about him," she said on CNN's "State of the Union" in response to a question about whether she had doubts about a Sanders presidency. 

Clinton also touted her own record, saying people know she would be a president who'd follow through on her promises.
"I think people know that I will be a president who will follow through on what I've said. That's why I've laid out plans," she said.
"I want to knock down all the barriers that stand in the way of people getting ahead and staying ahead. I want to protect people's rights. I want to protect our country. I want to unify our country, and I think I'm in a very good position to actually get that done."