Former President Trump has won enough delegates to clinch the Republican presidential nomination, AP projects.

Why it matters: President Biden became the presumptive Democratic nominee for president earlier on Tuesday, kicking off what is expected to be one of the longest presidential campaigns in modern history.

Driving the news: Trump was projected to win primaries in Georgia, Mississippi and Washington State on Tuesday. Republicans were also voting in Hawaii's caucuses.

• Trump needed at least 1,215 delegates to clinch the GOP nomination, and was positioned to do so with wins in Tuesday's contests.

The big picture: Trump has dominated every early GOP primary state and became the de facto GOP presidential nominee after former UN Ambassador Nikki Haley, his final serious challenge, suspended her campaign.

• Biden and Trump, even before their projected Tuesday victories, had started looking ahead to their expected rematch in November, ramping up attacks against each other.

What he's saying: Trump in a video posted to X expressed thanks for his nomination, which he called a "great day of victory."

• He said "we have to get to work to beat Joe Biden," so "we're not going to take time to celebrate."
• Trump added: "We'll celebrate in eight months when the election is over."

What to watch: Trump dominated Tuesday's GOP primary in Georgia, but possible warning signs emerged for him in the key battleground.

• Haley, despite having dropped out, had about 13% of the vote with more than 95% of the ballots counted, per AP. Biden narrowly beat Trump by fewer than 12,000 votes in Georgia in 2020.

Go deeper: Trump's team hires lawyer to "watch the money" at RNC

Editor's note: This article has been updated with comment from former President Trump.