President Donald Trump said on Sunday, Jan. 11, that he “couldn’t care less” even if Iran chooses to negotiate with his administration under maximum pressure campaign, warning Tehran not to develop nuclear weapons and kill their demonstrators.

“National Security Adviser suggested today that sanctions & protests have Iran ‘choked off,’ will force them to negotiate. Actually, I couldn’t care less if they negotiate. Will be totally up to them but, no nuclear weapons and ‘don’t kill your protesters,” President Trump tweeted on Sunday, Jan. 12.

The president made the remark after his National Security Adviser Robert O’Brien said the administration’s maximum pressure campaign is forcing Iran “to have no other choice but to come to the table.”

During an interview with “Fox News Sunday,” O’Brien touted that the new sanctions are successfully ramping up pressure on Iran.

“I think the maximum pressure campaign is working,” The Hill quoted O’Brien saying in the interview. “Iran is being choked off, and Iran is going to have no other choice but to come to the table.”

“What’s going to cause them to negotiate is the pressure on the economy, and when you’ve got students out there chanting, ‘Death to the dictator,’ and when you have thousands of Iranians out protesting in the street, that’s the sort of pressure that’s going to bring them to the table,” the adviser said.

The Iranian demonstrators took to the streets after its government admitted it had “unintentionally” shot down a Ukrainian passenger jet last week.

In a tweet earlier on Sunday, President Trump also issued his warning to the Islamic regime.

“To the leaders of Iran – DO NOT KILL YOUR PROTESTERS. Thousands have already been killed or imprisoned by you, and the World is watching. More importantly, the USA is watching. Turn your internet back on and let reporters roam free! Stop the killing of your great Iranian people!”

Tensions between the two countries re-emerged on Jan. 3 after an U.S. airstrike killed Iranian Gen. Qassem Soleimani near Baghdad’s airport in Iraq. Tehran responded with more than dozens of missiles aimed at two U.S. bases in Iraq, but the strikes caused minimal damage and no casualties.

Hours later, an Iranian Revolutionary Guard unit shot down a Ukrainian civilian jetliner shortly after it took off from Tehran, killing all 176 people aboard. Iran later acknowledged that its forces “unintentionally” shot down the plane, after insisting that the deadly crash was caused by mechanical failure. The belated admission has set off angry protests against the regime.

President Trump on Saturday also tweeted a message of support to Iranian anti-government protesters, saying his administration will continue to stand with them.