Though he brags his campaign is largely self-funded, Trump has expanded his fundraising team and announced his first campaign fundraiser, in LA

Presumptive Republican presidential nominee Donald Trump made a rare appearance at party fundraiser on Wednesday, boosting a county GOP group while he is on the brink of dramatically expanding his own fundraising efforts.

But if the Long Island, New York, event was meant to act as a sneak preview of what a newly honed Trump fundraising pitch will look like, it's clear the celebrity businessman does not plan to change his brash, showman-like approach.

He taunted his defeated Republican rivals. He told the crowd that it would grow 'so tired of winning' while he was in the White House they'd beg him to lose once in a while to keep things interesting. He mocked Hillary Clinton's loss in the West Virginia primary, saying 'she got her a** kicked last night.'

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Republican presidential candidate Donald Trump pictured during an interview with The Associated Press in his office at Trump Tower in New York, Tuesday. He spoke at a GOP fundraiser in Long Island Wednesday

Trump previously spoke in Bethpage, Long Island, in April ahead of the New York primary election

And he appealed to the Long Island crowd, gathered at a suburban country club just a dozen or so miles from where the celebrity businessman grew up.

'These are my people,' he declared to cheers from the approximately 2,000 people who paid $200 each to attend the Nassau County GOP's annual 'Patriots Reception' dinner. He boldly predicted he would be victorious this November in New York, a Democratic stronghold for generations.

'I think we could win New York State. I really believe we can win this state,' he said. 'And if we win New York State, the election is over.'

Donald Trump speaks on Long Island at fundraiser for Nassau County GOP pic.twitter.com/kxrIWu3hPr — Jonathan Lemire (@JonLemire) May 12, 2016

Tons of people @ Crest Hollow CC in Woodbury for Donald Trump's speech to #Nassau GOP. pic.twitter.com/bFeDifxSPF — Noah Manskar (@noahmanskar) May 11, 2016

Trump mixed in a few local flourishes — including suggesting a Long Island construction company could win the contract to build his proposed Mexican border wall — but largely delivered the same style of speech he has been giving across the nation, including at a handful of fundraisers, since he launched his unlikely presidential campaign 11 months ago.

It remains to be seen if he'll change his approach when he begins more aggressively asking for money for his general election bid.

Trump had made it a point of pride to note that he has largely self-funded his campaign to this point and has been able to eschew time-consuming fundraising. However, just hours before he spoke on Long Island, his team booked his first campaign fundraiser, set to be held later this month in Los Angeles.