Chris Christie told CNBC on Friday that a 2020 Democratic presidential nomination of Sen. Elizabeth Warren would be a "gift" to President Donald Trump's efforts to keep the White House for Republicans.

Christie, former New Jersey governor and unsuccessful 2016 GOP presidential candidate, suggested that Warren's liberal agenda won't resonate with American voters.

"Please, Lord, nominate her," Christie said in a "Squawk Box" interview, slamming Warren's proposed wealth tax as a message that "people who make money suck, and we'd like to take their money from them."

In a CNBC interview Thursday, Warren defended her bid to impose a 2 percent tax every year on households with assets over $50 million and a 3 percent tax on households with assets over $1 billion.

"I want these billionaires to stop being freeloaders," the Massachusetts Democrat said on "Mad Money with Jim Cramer."

Christie also scoffed at Democratic socialist Rep. Alexandria Ocasio-Cortez's proposal to target the wealthy. "She's having her moment. We're very happy for her," he said. Ocasio-Cortez, a freshman firebrand from New York, wants to slap a 70 percent marginal tax rate on income above $10 million.

Christie said Democrats would be better served nominating centrist Joe Biden, adding that the former vice president might be able to siphon off some of Trump's working-class base by relating to them with his modest upbringing.

Christie appeared on CNBC minutes after New Jersey Sen. Cory Booker launched a bid for the 2020 presidential nomination, the latest Democrat to enter a growing field.

The former New Jersey governor said he likes Booker personally but stressed its too early to tell how any of these Democratic hopefuls might fare. "Remember, four years ago at this time, the front-runner for Republicans was Jeb Bush. So it doesn't really matter. It's too early to figure out."

Bush ran as a more moderate, establishment Republican in a crowded field for the GOP nomination in the last presidential campaign. But he failed to gain traction with voters and dropped out in February 2016. Christie, who had positioned himself as more of a conservative, left the race shortly after Bush.

However, Christie, 56, told CNBC on Friday he wouldn't rule out another bid for the presidency "someday," but he said he won't challenge Trump in 2020 for the GOP nomination.

"[Trump's] popularity is among Republicans right now is 81 percent. That doesn't leave you a whole heck of a lot of room to primary somebody. Now, if things change over the course of the next six or nine months some people may look at it. There are some folks who don't like him. But right now, it's very unlikely," said Christie, who has had an on-again-off-again relationship with Trump.

Christie is out promoting his new book, "Let Me Finish: Trump, the Kushners, Bannon, New Jersey, and the Power of In-Your-Face Politics."

WATCH: Here's the full interview with Christie