GOP front-runner Donald TrumpDonald TrumpTrump: I was 'psyched to terminate' NAFTA Trump: 'Major, major' conflict with North Korea possible Cohn: People 'wasting time' calling for Trump's tax returns MORE is showing more confidence about his chances of winning the party's nomination and the presidency in 2016.
In an exclusive interview with The Hill last month, Trump refused to predict that he'd be the Republican nominee, calling such talk “presumptuous.”
Trump is now saying that not only will he win the nomination, but that Democratic front-runner Hillary ClintonHillary Rodham ClintonTrump on presidency: 'I thought it would be easier' Trump threatens to scrap 'horrible' South Korea trade deal New science-fiction book set in future where Clinton won MORE is poised to collapse.
"I think [Clinton] may not be able to run, to be honest, because this whole email thing is a horrible thing,” Trump said Sunday on NBC's "Meet the Press."
And when grilled by Chuck Todd on his policy positions, Trump responded, "In four years you're going to be interviewing me and you're going to say, 'What a great job you've done, President Trump.'"
Here's a look at how Donald Trump has grown more bullish on the campaign trail:
April 18: “I think I can beat her and not a lot of other people could,” Trump said of Hillary Clinton, two months before entering the race. “If I get into a primary, I am going to fight like you wouldn’t believe,” he added.
June 17: “I would say anywhere from 10 to 20 percent. Ten to 20,” Trump said when asked about his chances of winning the race. “One thing I can tell you, I will be trying.”
June 28: Trump insisted he was serious about his race, telling CNN's "State of the Union," "I'm in it to win it."
July 15: Trump called the upcoming race a "challenge." "I look forward to the challenge of winning the presidency and doing a fantastic job for our country,” Trump said after filing his financial paperwork.
July 22: In an interview with The Hill, Trump declined to follow former House Speaker Newt Gingrich (R-Ga.), who predicted victory in the 2012 race by saying, "I'm going to be the nominee." Trump said he wouldn't be "presumptuous."
“I’m surprised that I’m this high," he said of his poll numbers.
July 23: “I wanna run as a Republican. I think I’ll get the nomination,” Trump said during his trip to the U.S.-Mexico border. “She’s [Clinton] going to be beat, and I’m the one who’s going to beat her.”
July 24: On MSNBC's "Morning Joe" Trump faced questions about whether the interest in his candidacy would last. “I'm just chugging along,” Trump said. “You know, maybe people will get tired of me. Who knows? I mean, this press is crazy. ... I don't know, maybe people get burned out.”
July 29: "When you and I spoke three or four months ago, I wasn't even going to be in the contest according to various people," Trump told Jake Tapper on CNN's "State of the Union." "Now I'm leading easily in a lot of the races, because people are sick and tired. So with Hillary, I think I'll beat Hillary easily. I think I will beat Hillary, I don't think these other guys will," he added, dismissing his GOP rivals.
August 14: In an interview with Breitbart News, Trump was asked whether he could imagine a general election fight between him and Vice President Joe BidenJoe BidenThe Hill's 12:30 Report Biden spotted at Wizards playoff game Trump’s wall jams GOP in shutdown talks MORE as the Democratic nominee. "I think so," Trump answered. And he predicted the controversy over Hillary Clinton's use of a private email account would knock her out of the race. "I hear this thing is big league," said Trump.
August 16: “I’m running as a Republican. I’m leading as a Republican. I will win. I think I’m going to get the nomination, and if I get the nomination, I think I will be president. And if I’m president we are going to have a great country,” Trump said in an interview on "Meet the Press."
"It will work out so well," Trump told host Chuck Todd, when pressed on his immigration policies.
"You'll be so happy. In four years you're going to be interviewing me and you're going to say, 'What a great job you've done, President Trump.'"