In her first interview of the 2016 presidential campaign, Hillary Clinton stated that she is not worried about any of her competitors, Republican or Democrat.

"Well, first of all, I always thought this would be a competitive race. So I am happy to have a chance to get out and run my campaign as I see fit and let other candidates do exactly the same," Clinton told CNN Tuesday night.

Her main Democratic opponent, Vermont Sen. Bernie Sanders, has started closing the gap in polls in both Iowa and New Hampshire. Sanders has said he would raise taxes significantly if elected. When asked if she would do the same Clinton avoided the question by saying she would put out her own economic plan in a speech next week.

The former secretary of state said that she "couldn't feel happier about her campaign," and that she has volunteers in every district in Iowa.

Clinton was more critical of her possible Republican foes. When asked about the immigration policies of Republicans Jeb Bush and Donald Trump, she expressed frustration with the Republican Party's lack of commitment to comprehensive immigration reform.

"[T]hey are all in the, you know, in the same general area on immigration," Clinton said. "They don't want to provide a path to citizenship. They range across a spectrum of being either grudgingly welcome or hostile toward immigrants."

She claimed that Bush, the GOP front-runner and a former Florida governor who spent much of his career working with the immigrant communities, "no longer" believes in a path to citizenship. But the GOP's response to Trump is even worse, she added.

""I'm very disappointed in those comments and I feel very bad and very disappointed with him and with the Republican Party for not responding immediately and saying, enough, stop it," Clinton said.

Clinton has long been an advocate of comprehensive immigration reform but has yet to outline a specific plan.