"If something happens blame him and court system. People pouring in. Bad!" President Donald Trump tweeted Sunday afternoon. | Getty Trump resumes Twitter attacks on judge

President Donald Trump on Sunday resumed tweeting against the judge who blocked his executive order on immigration, blaming the court system "if something happens" that could put the U.S. in "peril."

"Just cannot believe a judge would put our country in such peril. If something happens blame him and court system. People pouring in. Bad!" he tweeted Sunday afternoon in reference to Judge James Robart, a district court judge based in Washington state.


A few minutes later, he tweeted again: "I have instructed Homeland Security to check people coming into our country VERY CAREFULLY. The courts are making the job very difficult!"

Trump's tweets came after an appeal filed by the Justice Department was turned down. The appeal would have lifted a ruling that is currently halting Trump's immigration order.

On Friday, Robart put a halt on Trump's immigration order, which restricts travel to the U.S. from seven Muslim-majority countries — Iran, Iraq, Libya, Somalia, Sudan, Yemen and Syria — and stopped admittance of Syrian refugees to the United States.

The Justice Department filed an appeal late Saturday to the San Francisco-based 9th U.S. Circuit Court of Appeals, asking for Robart's order to be put on hold while the appeals court considers an open-ended stay of the ruling. The appeal court reject that request Sunday morning.

The president fired off a batch of four tweets Saturday, starting with: "What is our country coming to when a judge can halt a Homeland Security travel ban and anyone, even with bad intentions, can come into U.S.?"