Pres. Donald Trump took to Twitter on Sunday afternoon to lash out at the Washington federal judge who blocked his executive order banning travelers from certain Muslim-majority nations from entering the country.

“Just cannot believe a judge would put our country in such peril. If something happens blame him and court system. People pouring in. Bad!” the president tweeted.

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Just cannot believe a judge would put our country in such peril. If something happens blame him and court system. People pouring in. Bad! — Donald J. Trump (@realDonaldTrump) February 5, 2017

He followed up by saying, “I have instructed Homeland Security to check people coming into our country VERY CAREFULLY. The courts are making the job very difficult!”

I have instructed Homeland Security to check people coming into our country VERY CAREFULLY. The courts are making the job very difficult! — Donald J. Trump (@realDonaldTrump) February 5, 2017

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Trump’s Muslim ban was chaotically implemented and ultimately unconstitutional, say critics. In spite of an injunction by Washington federal Judge James Robart halting the executive order, Trump has vowed to continue to fight for the Muslim ban in court.

Twitter users responded to the president’s Sunday outburst with mockery and alarm.

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@realDonaldTrump bad! Bad judge! Bad court house! Trump mad wah *stamps feet — Malick P. (@MalickP2) February 5, 2017

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So President Trump has been more critical of a federal judge who is trying to honor the constitution, than he has been of Putin. Wow. — Matthew Dowd (@matthewjdowd) February 5, 2017

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