Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE will go on the attack against Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE in a speech next week that details why he believes the former secretary of State is unfit for office.

The speech will take place at 2:30 p.m. on Monday at Saint Anselm College in Manchester, N.H., the campaign said. The invitation-only event will be closed to the public.

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It will be Trump’s first major address since the final states cast ballots in the Republican presidential primary on June 7.

Trump teased the address in his victory speech on Tuesday night, in which he fired the starting gun on what’s expected to be a nasty general election battle between himself and Clinton.

“The last thing we need is Hillary Clinton in the White House or the extension of the Obama disaster,” Trump said.

“The Clintons have turned the politics of personal enrichment into an art form for themselves. They’ve made hundreds of millions of dollars selling access, selling favors, selling government contracts. … Secretary Clinton even did all of the work on a totally illegal private server … and the corrupt system is totally protecting her.”

The speech could help rally Republicans against a common enemy as Trump continues to deal with blowback from within his own party over remarks he made about the Mexican heritage of an Indiana-born federal judge.

New Hampshire is one of several battleground states with heated Senate elections that could be critical in determining who wins the White House and holds a majority in the upper chamber.