Sheldon Adelson, whose wealth is estimated at $39.2 billion, is one of the Republican Party's most prominent donors.
"He is a threat because he's already dropped $400 million in this campaign," said the Massachusetts senator.
The billionaire businessman has spent about $418 million on television ads, which is about $100 million more than all of the other Democratic contenders combined.
"I still do not think he is the best candidate for our country," the Democratic presidential candidate noted.
The former White House chief strategist narrowed the 2020 presidential race down to "oligarch" billionaire Michael Bloomberg and President Donald Trump.
"I'm reading some headlines from newspapers about Pete Buttigieg," Sanders said. "Which side are you on?"
The billionaire former New York City mayor argued that he can beat Trump by appealing to "middle of the road Republicans."
"At some point in time, you do too much of one thing, then you should stop doing it," the billionaire presidential candidate said.
Stephen Moore said on a Monday segment of Fox News that if the middle class is disappearing, it's because they're getting richer, "which is a good thing."
"I'm running for president to defeat Donald Trump and rebuild America," Michael Bloomberg, 77, announced on Sunday.
Recent history shows that a large amount of money on hand doesn't necessarily guarantee a campaign's success. At the same time, nobody as rich as Michael Bloomberg has ever run for president.
The Morning Consult poll also found that the billionaire former New York City mayor would beat Trump by 6 percent.
"One billionaire calls another billionaire and asks him to run for president—I'm shocked!" Warren tweeted.
The rapper is unhappy about not being named a billionaire by Forbes.
"The activist is not the man who says the river is dirty," Perot once said. "The activist is the man who cleans up the river."
"There is a growing movement in this country with socialist-leaning undertones, that wealth should be demonized," Lahren said.
At 21 years old, reality TV star turned entrepreneur Kylie Jenner took over Mark Zuckerberg's place as the world's youngest self-made billionaire.
"We believe that Mr. Palmer has systematically and in bad faith retained security deposits in violation of California law," attorney Jimmie Davis Parker told Newsweek.
"In a sense, the Afrikaner [a white South African minority] was downtrodden," Johann Rupert said. "They didn't go and buy BMWs and hang around at Taboo or The Sands [fancy clubs] all the time."
Epstein's settlement prevented testimony from women who have accused the financier of sexually abusing minors.
While recreational cannabis remains illegal in the U.K., a Greek billionaire plans to launch "miracle" cannabis products in Scotland.
"These threats are not isolated but a part of a larger assault on the norms that uphold our democracy," Steyer's office said in a statement about this latest package.
The founder of China's second largest e-commerce company was arrested over allegations of sexual misconduct.
A bipartisan bill wants to halt the possibility of returning to business as usual with the Kremlin, instead asking for a report on Putin's finances and those of his close associates.
Shares in the social-networking platform plummeted by as much as 24 percent on Wednesday.
The 82-year-old billionaire is accused of inappropriately touching the former employees on his business jet.
The proposal received enough signatures to qualify for the November ballot.
Pinchuk is worth $1.4 billion.