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Donald Trump said a new chapter of the campaign has begun and previewed a forthcoming speech detailing Hillary Clinton's alleged corruption on Tuesday, the final day of voting in the GOP presidential primary.

"Tonight we close one chapter in history and begin another," Trump told a room full of supporters.

In an uncharacteristically scripted speech, Trump thanked voters in New Jersey and South Dakota for his projected unopposed victories. Republicans in California, Montana and New Mexico are also voting.

But his speech, which he delivered using teleprompters at Trump National in Westchester, New York, was focused mostly on his campaign's message of "winning" trade deals and international agreements, as well as ripping Clinton for controversies and her record as secretary of state.

"The Clintons have turned the politics of personal enrichment into an art form for themselves," Trump said. He said he is planning to deliver a speech going into detail about Clinton's controversies next week.

Trump also began his speech by appealing to Bernie Sanders supporters after new new organizations declared Clinton the presumptive Democratic nominee Monday night.

"To all of those Bernie Sanders voters who have been left out in the cold by a rigged system of superdelegates, we welcome you with open arms," Trump said.