Republican presidential candidate 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 has secured the necessary number of delegates to clinch the GOP nomination.

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The Associated Press first reported Thursday that Trump hit 1,237 delegates — the magic number that gives him a majority — after a small number of unbound party delegates that told the news service that they would support him.

Trump has been the only remaining GOP candidate in the race since early this month, when rivals Ted Cruz Rafael (Ted) Edward CruzVideo of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Democrat on Graham video urging people to 'use my words against me': 'Done' MORE and John Kasich dropped out.

The presumptive nominee had been very close to clinching the nomination for a little over a week, needing fewer than 100 more delegates. The current count from multiple news organizations puts Trump at 1,238.

The newly pledged unbound delegates include Oklahoma Republican Party Chairwoman Pam Pollard, who told the AP that Trump "has touched a part of our electorate that doesn't like where our country is."

Trump launched his outsider campaign on June 16 last year and knocked off 16 GOP rivals in his bid to secure the nomination. He has since moved to shore up support among Republicans, but deep reservations remain in parts of the party given the candidate's penchant for jabbing at critics.

The businessman swiped at New Mexico Gov. Susana Martinez (R) on Tuesday night during a rally in her home state, calling on her to do a better job. A slew of former GOP rivals, such as Marco Rubio Marco Antonio RubioSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Florida senators pushing to keep Daylight Savings Time during pandemic Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll MORE, Jeb Bush and Scott Walker, came to the defense of the country's first Latina governor.

Some delegates have offered only tepid support for Trump. Pennsylvania delegate Cameron Linton told the AP that because Trump won the state's primary, he'll support him on the first ballot at the Republican National Convention in July. But, he said, he wouldn't vote for Trump on a second ballot.

"He's ridiculous. There's no other way to say it," Linton said.

Still, “leadership is leadership,” said Colorado GOP Chairman Steve House, another unbound delegate who confirmed his support on Thursday.

"If he can surround himself with the political talent, I think he will be fine,” House said.

Trump stood at the top of polls since launching his bid, and his penchant for jabbing his rivals — labeling them "low energy" Jeb Bush, "little Marco" Rubio and "Lyin' Ted" Cruz — helped the celebrity businessman dominate the news almost constantly.

He also drew global attention and backlash for his many controversial remarks, such as proposing in December to temporarily ban Muslims from entering the United States and for not more forcefully disavowing support from white supremacists.

Violent protests have erupted at some of Trump's rallies across the country, with police breaking up crowds in Chicago and, as recently as Tuesday night, Albuquerque, N.M. Physical altercations inside many of Trump's rallies were also televised.

His success stood in stark contrast to the far less crowded Democratic race, which at its peak only had six contenders and has been contested in recent months by longtime front-runner 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 and challenger Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE.

Clinton has recently shifted her focus toward the likely match-up with Trump in November, and this week she lambasted the businessman for saying he looked forward to buying up property at low prices ahead of the 2008 housing market crash.

Trump, meanwhile, he returned fire, going after her use of a personal server while serving as secretary of State in the Obama administration and highlighting assault allegations against her husband, as well as entertaining conspiracy theories surrounding the suicide of former Bill Clinton William (Bill) Jefferson ClintonDolly Parton remembers Ginsburg: 'Her voice was soft but her message rang loud' Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Calls grow for Biden to expand election map in final sprint MORE aide Vince Foster.