The American Civil Liberties Union tweeted their thanks to President Trump Sunday for calling his travel ban a ban, after his administration previously insisted the executive order was not one.

The ACLU tweeted "Glad we both agree the ban is a ban" in response to Trump's tweet saying that the U.S. needed his "travel ban" in place after a terror attack in London left at least seven dead and nearly 50 wounded.

The ACLU has battled the Trump administration in court over the ban.

Glad we both agree the ban is a ban. https://t.co/p1qXkffyIL — ACLU National (@ACLU) June 4, 2017

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"We need to be smart, vigilant and tough. We need the courts to give us back our rights. We need the Travel Ban as an extra level of safety!" Trump tweeted Saturday.

We need to be smart, vigilant and tough. We need the courts to give us back our rights. We need the Travel Ban as an extra level of safety! — Donald J. Trump (@realDonaldTrump) June 3, 2017

Press secretary Sean Spicer has previously denied that Trump's executive order temporarily blocking entry to the U.S. of refugees and travelers from several majority-Muslim countries should be called a "ban," despite Trump using the term himself.

“It's not a Muslim ban. It's not a travel ban,” Spicer told reporters in January. “It's a vetting system to keep America safe.”