President Donald Trump's approval rating is at an all-time high of 45% in the Gallup weekly tracking poll.

His disapproval rating is 50%, near its record low.

Trump's approval rating at this point in his presidency lines up with the ratings of other presidents at similar times in their first terms.

His new spike in approval could take a hit because of backlash against the administration's controversial policy that has led to the separating of families at the US-Mexico border.

President Donald Trump's approval rating reached an all-time high of 45% in the Gallup weekly tracking poll released on Sunday.

Gallup — considered the gold standard of gauging approval ratings — polls a representative sample of 1,500 Americans by telephone every week, with a margin of error of plus or minus 3 percentage points.

Trump's disapproval rating is at 50%. It was lower only at beginning of his term in January 2017 and has been as high as 60% in previous months.

Trump's approval rating 513 days into his presidency is on par with those of other presidents at similar points in their first terms. President Barack Obama's approval rating was 45% on Day 523, and President Bill Clinton had 44% approval on Day 524.

Nate Silver, the data analyst who founded the data-journalism site FiveThirtyEight, theorized that Trump's spike in the approval rating this week was most likely due to Republicans' positive reactions to the summit with North Korean leader Kim Jong Un last Tuesday.

Silver said that temporary increase was likely to disappear in the coming weeks, as the Trump administration faces mounting backlash from Democrats and Republicans alike over its controversial "zero-tolerance" immigration policy that has led to the separation of parents and children at the US-Mexico border.

A Quinnipiac University poll published Monday found that 66% of Americans oppose the administration's family-separation policy and 27% support it. Most Republican respondents supported it, but by a narrow margin of 55% to 35%.