Former New York City mayor Michael Bloomberg has said he will decide by the end of the month whether to seek the presidency.

The 76-year-old businessman, one of the richest men in the world, has been openly contemplating a Democratic White House bid since late last year.

In an interview, Mr Bloomberg said he has “three more weeks” to make his decision in line with his plan to announce his intentions before the end of February.

He also rejected a recent report suggesting he likely would not run if former Vice President Joe Biden enters the race.

BrexitFormer US vice-president Joe Biden is due to decide soon on whether to seek the top job (Niall Carson/PA)

“My decision doesn’t depend on what other people are going to do,” Mr Bloomberg said.

“My decision depends on whether or not I think I can make a difference.”

Mr Bloomberg’s decision comes as a handful of high-profile Democrats consider joining the 2020 race.

Mr Biden and former Texas Congressman Beto O’Rourke, who earlier in the week said he would announce his decision “very soon”, are the most prominent of those yet to make a decision.

Enda Kenny visits US – day 5Michael Bloomberg is considering a possible bid for the presidency (Niall Carson/PA)

Should he run, Mr Bloomberg would bring virtually limitless resources and a pragmatic governing approach to the field.

The former Republican stands out for a decidedly more pragmatic governing approach than some of the early 2020 Democratic contenders, who are more aligned with the party’s far-left wing.

Mr Bloomberg has spent hundreds of millions of dollars to promote liberal priorities on climate change, gun control and immigration, including more than 100 million US dollars to help elect Democrats in the 2018 midterm elections.

He confirmed on Friday that he “would separate myself” from his foundation and private business should he launch a presidential campaign, just as he did as New York City mayor.

“I’m spending more time going around politically now,” he said.

Election 2020 Bloomberg ClimateMichael Bloomberg photographs a floating solar array in a pond at an Orlando (Phelan M. Ebenhack/AP)

“You can see the beginning of a transition.”

Initially registered as a Democrat, the Massachusetts native filed paperwork to change his voter registration to Republican in 2000 before his first run for New York City mayor, according to a spokesman.

In June 2007, he unenrolled from the Republicans, having no formal party affiliation until he registered again as a Democrat last October.

While he would walk away from his private organisations should he run, Mr Bloomberg lashed out at those who suggest his private work would present conflicts of interest as a presidential candidate.

“Some of the people that say that are legislators who take money from industries where they’re regulating them,” he said.

“Maybe they should go worry about what they’re doing.”