In the five years American Leslie Allen has lived in Whangarei, she has travelled back and forth to the United States.

But she has no intention of going back after Donald Trump captured the White House.

The healthcare worker from Kentucky voted for Democrat Hillary Clinton and was just as stunned as millions around the world at Trump's election as US President.

"I wasn't happy with either party but I wouldn't have gone for Trump. He's a wealthy bully, racist American that we try to avoid at any cost," she said.

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Clinton's quest to make history as the first female president was thwarted by Trump's breathtaking performance at the polls. He was carried to victory by voters fed up with the political system and mistrustful of Clinton, a former first lady, senator and secretary of state.

But Ms Allen said the election result was "quite horrible".

"After this vote I have no intention of going back."

Ms Allen said she left the United States because of a plethora of reasons, including poor healthcare and shocking gun controls.

Other Whangarei-based Americans, Richard Eiger and wife Gina, also voted for Hillary Clinton and cast doubts over the President-elect's ability to fulfil promises he made before the election.

"The thing that's always been interesting to me is not who Trump says he is but the number of people who bought into it, supported and voted him in," Mrs Eiger said.

"I find him to be a racist and a bully who installed fear and hate in people and that's what's concerning me. It'll be interesting what he can accomplish because he's made a lot of promises that were outlandish and I don't think he can fulfil them," she said.

She is from Montana.

Mr Eiger is from Chicago and said he expected Trump to exhibit statesman-like behaviour.

"I am reasonably confident the systems in place around the president will ensure he maintains that behaviour and be able to moderate his activities."

Trump, a 70-year-old celebrity businessman who had never before run for office, is poised to become the oldest president ever elected to a first term.

Meanwhile, Immigration New Zealand said its website had 56,300 visits from Americans on Wednesday - almost 2500 per cent more than normal- who want to live, work, study and invest in this country.

Canada's immigration website crashed on Wednesday night because of interest from Americans, while Australian media are also reporting a potential influx of Americans.