Prime Minister Boris Johnson's landslide victory in the United Kingdom's elections is a warning for Democrats hoping to defeat President Trump next year, according to Joe Biden.

“You’re also going to see people saying, 'My God, Boris Johnson, who is kind of a physical and emotional clone of the president, is able to win,'” Biden, 77, told donors in San Francisco late Thursday.

Johnson, 55, delivered the Conservative Party a 161-majority in the House of Commons, thrashing the Labour Party and giving the Tories their largest margin in the British Parliament's lower chamber since Margaret Thatcher's majority of 102 in 1987. Labour's Jeremy Corbyn, 70, announced he would eventually quit as leader after a period of “reflection” regarding the "disappointing" results, his party's worst showing at the polls since the 1930s. Corbyn, a socialist, addressed criticism in his concession speech over his failure to stamp out anti-Semitism in his ranks and his alienation of traditional Labour voters by pushing the party to the left of the political spectrum.

Meanwhile, Johnson, who was appointed prime minister in May after Theresa May stepped down, now has a mandate to take Britain out of the European Union, vowing to "get Brexit done" by the end of January. The New York-born former mayor of London and ex-foreign secretary is often compared to Trump, who endorsed Johnson in his bid to replace May earlier this year. The pair, who share a similar light blond, coiffed hairstyle, both have a propensity for chaffing with establishment politicians given their distaste for political correctness and populist beliefs.

Biden, a moderately center-left top-tier aspirant for the 2020 Democratic presidential primary, said Thursday, "Johnson is winning in a walk." The 36-year Delaware senator predicted news headlines would read, “Look what happens when the Labour Party moves so, so far to the left. It comes up with ideas that are not able to be contained within a rational basis quickly.”

The two-term vice president added Democrats would place a premium on bipartisanship and an ability to unite the party as Iowa's opening caucuses on Feb. 3 near.

“Presidents are supposed to be able to persuade and work something out,” he said.