Support for President Donald Trump increased slightly among Republicans after he lashed out on Twitter over the weekend in a racially charged attack on four minority Democratic congresswomen, a Reuters/Ipsos public opinion poll shows.

The national survey, conducted on Monday and Tuesday after Mr Trump told the politicians they should “go back and help fix the totally broken and crime infested places from which they came,” showed his net approval among members of his Republican Party rose by 5 percentage points to 72 per cent, compared with a similar poll that ran last week.

AP

Mr Trump, who is seeking re-election next year, has lost support, however, with Democrats and independents since the Sunday tweetstorm.

Among independents, about three out of 10 said they approved of Mr Trump, down from four out of 10 a week ago. His net approval - the percentage who approve minus the percentage who disapprove - dropped by 2 points among Democrats in the poll.

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Mr Trump’s overall approval remained unchanged over the past week. According to the poll, 41 per cent of the US public said they approved of his performance in office, while 55 per cent disapproved.

The results showed strong Republican backing for Mr Trump as the Democratic-led US House of Representatives passed a symbolic resolution on Tuesday, largely along party lines, to condemn him for “racist comments” against the four Democratic lawmakers.

All four representatives - Alexandria Ocasio-Cortez of New York, Ilhan Omar of Minnesota, Ayanna Pressley of Massachusetts and Rashida Tlaib of Michigan - are US citizens. Three were born in the United States.

AAP Image/EPA/JIM LO SCALZO

The public response to Mr Trump’s statements appeared to be a little better for him than in 2017, after the president said there were “very fine people” on both sides of a deadly white nationalist rally in Charlottesville, Virginia.

In that instance, Mr Trump’s net approval dropped by about 10 points a week after the Charlottesville rally.

This time, while Democrats and some independents may see clear signs of racial intolerance woven throughout Mr Trump’s tweets, Republicans are hearing a different message, said Vincent Hutchings, a political science and African-American studies professor at the University of Michigan.

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“To Republicans, Trump is simply saying: ‘Hey, if you don’t like America, you can leave,” Hutchings said. “That is not at all controversial. If you already support Trump, then it’s very easy to interpret his comments that way.”

AAP

By attacking liberal members of the House, Mr Trump is “doing exactly what Republicans want him to do,” Hutchings said. “He’s taking on groups that they oppose.”

The Reuters/Ipsos poll was conducted online in English and gathered responses from 1,113 adults, including 478 Democrats and 406 Republicans in the United States. It has a credibility interval, a measure of precision, of 3 percentage points for the entire group and 5 points for Democrats or Republicans.