PALM BEACH, Nov 15 (AFP) - Donald Trump, who has mounted relentless attacks on the integrity of U.S. voting since his 2020 election defeat, on Tuesday launched a bid to regain the presidency in 2024, aiming to pre-empt potential Republican rivals.

Seeking a potential rematch with Democratic President Joe Biden, Trump made his announcement at his Mar-a-Lago estate in Florida a week after midterm elections in which Republicans failed to win as many seats in Congress as they had hoped.

In a speech lasting a little more than an hour and broadcast live on U.S. television, Trump spoke to hundreds of supporters in a ballroom decorated with several chandeliers and lined with dozens of American flags.

"In order to make America great again, I am tonight announcing my candidacy for president of the United States," Trump said to a cheering, phone-waving crowd, which included family members, donors and former staffers.

Earlier in the day, aides filed paperwork with the U.S. Federal Election Commission setting up a committee called "Donald J. Trump for President 2024."

Trump steered clear of the name-calling that has marked other public appearances, opting instead for a critique of Biden's presidency and a review of what Trump said were the policy achievements of his own time in office.

"Two years ago we were a great nation and soon we will be a great nation again," he said.

Trump laid out familiar dark themes from his playbook, denouncing migrants - "We're being poisoned" - and portraying American cities as in the grip of a crime wave that has left them "cesspools of blood."

He said he would push for the death penalty for drug dealers and term limits for lawmakers and rehire members of the military who had been dismissed for refusing to get the COVID-19 vaccine.

Although he assailed the U.S. election process, he did not use his speech to relive his false claims of massive voter fraud in 2020 and did not mention the Jan. 6, 2021 attack by his supporters on the U.S. Capitol.

Trump predicted his campaign will be opposed by left-wing groups, the Washington establishment and the news media. "But we will not be intimidated. We will persevere. We will march forward into the torrent."

LONG ROAD There is a long road ahead before the Republican nominee is formally selected in the summer of 2024, with the first state-level contests more than a year away.

Trump's announcement comes earlier than usual even in a country known for protracted presidential campaigns and signals his interest in discouraging other possible contenders such as Florida Governor Ron DeSantis or his own former vice president, Mike Pence, from making a bid for the Republican Party's 2024 presidential nomination.

DeSantis handily won re-election as governor during the midterms. Pence, while promoting his new book, has sought to distance himself from Trump. Other potential Republican presidential hopefuls include Virginia Governor Glenn Youngkin, Texas Governor Greg Abbott, former South Carolina Governor Nikki Haley and former Secretary of State Mike Pompeo.

Trump played an active role in the midterms, recruiting and promoting candidates who echoed his false claims that the 2020 election was stolen from him through widespread voting fraud.

But many of his candidates in key battleground states lost, prompting some prominent Republicans to openly blame him for promoting weak candidates who derailed the party's hopes of taking control of the Senate.

Control of the House of Representatives remains up in the air, but Republicans are on track to win a razor-thin majority.

Trump will seek his party's nomination even as he faces trouble on several fronts, including a criminal investigation into his possession of government documents taken when he left office as well as a congressional subpoena related to his role in the Jan. 6, 2021, assault. Trump has called the various investigations he faces politically motivated and has denied wrongdoing.

Trump, 76, is seeking to become only the second U.S. president in history to serve non-consecutive terms, after Grover Cleveland, whose second stint ended in 1897. Biden, 79, said last week he intends to run for re-election and will likely make a final decision by early next year.

In an Edison Research exit poll, seven out of 10 midterm voters expressed the view that Biden, who remains deeply unpopular, should not run again. In the same poll, six of 10 respondents said they had an unfavorable opinion of Trump.