Half of U.S. voters said in a new poll that they believe the Trump administration has been too aggressive in deporting immigrants without legal status.

Fifty percent of voters polled by Quinnipiac University said they thought the administration is too aggressive in carrying out deportations, while 33 percent said it is acting in an appropriate manner.

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Thirteen percent of those surveyed said they did not believe the administration had been aggressive enough in deporting immigrants.

The survey comes as the Trump administration faces bipartisan backlash over its zero tolerance policy at the U.S. southern border, which has led to the separation of migrant families who crossed the border into the U.S. illegally.

Trump doubled down on the policy on Monday, but also called on Congress to change immigration laws to end it.

“Children are being used by some of the worst criminals on earth as a means to enter our country,” Trump said in a tweet. “Has anyone been looking at the Crime taking place south of the border. It is historic, with some countries the most dangerous places in the world. Not going to happen in the U.S.”

Children are being used by some of the worst criminals on earth as a means to enter our country. Has anyone been looking at the Crime taking place south of the border. It is historic, with some countries the most dangerous places in the world. Not going to happen in the U.S. — Donald J. Trump (@realDonaldTrump) June 18, 2018

“It is the Democrats fault for being weak and ineffective with Border Security and Crime. Tell them to start thinking about the people devastated by Crime coming from illegal immigration. Change the laws!” he said in a separate tweet.

It is the Democrats fault for being weak and ineffective with Boarder Security and Crime. Tell them to start thinking about the people devastated by Crime coming from illegal immigration. Change the laws! — Donald J. Trump (@realDonaldTrump) June 18, 2018

Trump will meet with House Republicans on Tuesday to address the issue of family separation at the border.

The Quinnipiac University poll was conducted on June 14 - 17, among 905 voters across the U.S. The margin of error of 3.9 percentage points.