Hillary Clinton says she's "absolutely confident" she will be her party's nominee.

She told ABC News' George Stephanopoulos that she's doing everything she can to win in as many places as possible and suggested she learned from her loss to then-Sen. Barack Obama in 2008, when she may have had more votes, but he won more delegates.

"So we have a system, and I am very confident that I will be the nominee, but I'm not taking anything or any place or anyone for granted," she said.

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"Even if you don't win New York?" Stepanopoulos followed up. "Oh, I'm absolutely confident I will be nominee," she responded.

The CBS News Battleground Tracker poll out Sunday shows Clinton up 53-43 percent in New York, which votes on Apr. 19, but she's in a tight race for Wisconsin Tuesday, running a little behind Bernie Sanders in the 49-47 percent, according to the CBS poll.

In March, she lost several of the caucus states, but won every one of the Mar. 15 races, which included Florida and Ohio, and she retains a pledged delegate advantage of more than 250 delegates over Sanders.

The two candidates have also been arguing over when and where to hold their next debate. While the two have settled on New York, they have yet been able to agree on a date or a specific place in New York.

CBS News' Katiana Krawchenko contributed to this report