US President Donald Trump addresses a 'Make America Great Again' rally in Greenville, North Carolina

Washington (AFP) - Fired up by Donald Trump, the crowd targeted Somali-born Democratic congresswoman Ilhan Omar, one of only three Muslims in the US House of Representatives, with cries of “Send her back! Send her back!”

The derisive chant at Trump’s “Make America Great Again” rally overnight set the tone for a 2020 White House campaign that is shaping up to be just as heated and toxic as the 2016 election.

Trump made it clear at the gathering in Greenville, North Carolina, that he plans to make his inflammatory attacks on Omar and three other left-leaning Democratic congresswomen a centerpiece of his re-election strategy.

Without a Democratic presidential candidate to focus on yet, the Republican chief executive is seeking to make the minority lawmakers known as the “Squad” the face of the Democratic Party.

Trump was rebuked by the Democratic-controlled House of Representatives on Tuesday for “racist comments” for saying the four should “go back” to their countries of origin if they are not happy in the United States.

A supporter of the US president poses with a Trump doll at a "Make America Great Again" rally in Greenville, North Carolina

The first-term lawmakers – all but one of whom, Omar, were born in the United States – are of Hispanic, Arab, Somali and African-American descent.

Trump shrugged off the House rebuke and went back on the offensive in Greenville.

To the delight of his thousands of supporters, Trump described Omar and the other Democrats as “left-wing ideologues (who) see our nation as a force of evil.”

“A vote for any Democrat in 2020 is a vote for the rise of radical socialism and the destruction of the American Dream – frankly the destruction of our country,” Trump said.

The crowd responded to his attacks with cries of “Send her back!” reminiscent of the “Lock her up!” chants directed in 2016 at the Democratic candidate, Hillary Clinton.

Some Republicans have urged Trump to tone down the rhetoric but the president clearly believes – despite the risk of inflaming racial tensions and widening the partisan divide – that he has latched on to a winning strategy.

- ‘Cynical strategy’ -

Trump tapped into a vein of grievance among white blue-collar and rural Americans to eke out a narrow victory in 2016 and he’s hoping to do the same again next year.

US Representatives Ayanna Pressley (R), Rashida Tlaib (second from R), Alexandria Ocasio-Cortez (third from R) and Ilhan Omar (L) were urged by Trump to "go back" to their countries of origin

“He’s rallying his base,” said Wendy Schiller, a professor of political science at Brown University. “His electoral strategy is to divide and conquer.”

“He needs every single one of those voters who voted for him in 2016 to vote for him again,” Schiller said. “He thinks this is a way to get them riled up now.”

“So it’s a smart strategy for him to make these four women the face of the Democratic Party, in his mind, in terms of maintaining the votes that he got in 2016.”

Trump won 57 percent of white voters in 2016 while Clinton won 37 percent.

Some 70 percent of the electorate next year is expected to be white. African-Americans, Hispanics and other minorities account for the rest and tend to vote for Democrats.

Larry Sabato, director of the Center for Politics at the University of Virginia, said Trump’s attacks on the “Squad” were aimed squarely at the white voters who delivered him the White House in 2016.

“It’s a cynical strategy,” Sabato said. “Most presidents wouldn’t do it because they don’t want to be tagged as racists by history. But Donald Trump doesn’t give a damn as long as he wins.”

- ‘Vile’ -

Several of the Democratic 2020 presidential hopefuls condemned Trump’s remarks.

The crowd at President Donald Trump's campaign rally in Greenville, North Carolina, on July 17, 2019

“It’s vile. It’s cowardly. It’s xenophobic. It’s racist,” said California Senator Kamala Harris. “It’s time to get Trump out of office and unite the country.”

“These members of Congress – children of immigrants, just like so many of us -— are an example of exactly what makes America great,” said Joe Biden, the former vice president.

Omar responded on Twitter with a quote from the late African-American poet Maya Angelou: “You may shoot me with your words, You may cut me with your eyes, You may kill me with your hatefulness, But still, like air, I’ll rise.”

Republican reaction has been more muted but some were speaking out.

“I deeply disagree with the extreme left & have been disgusted by their tone,” said Representative Adam Kinzinger of Illinois. “I woke up today equally disgusted – chants like ‘send her back’ are ugly, wrong, & would send chills down the spines of our Founding Fathers.

“This ugliness must end, or we risk our great union.”