Sen. John McCain lays the blame for Syrian President Bashar al Assad’s chemical attack on residents of Douma squarely at Donald Trump’s feet saying he “emboldened” the dictator by announcing plans of a US withdrawal.

McCain slammed Trump in a scathing statement:

“President Trump last week signaled to the world that the United States would prematurely withdraw from Syria. Bashar Assad and his Russian and Iranian backers have heard him, and emboldened by American inaction, Assad has reportedly launched another chemical attack against innocent men, women and children, this time in Douma. Initial accounts show dozens of innocent civilians, including children, have been targeted by this vicious bombardment designed to burn and choke the human body and leave victims writhing in unspeakable pain.

“Crimes against humanity have become Assad’s trademarks in his relentless campaign against the people of Syria that has killed more than half a million people and forced 11 million from their homes. President Trump was quick to call out Assad today, along with the Russian and Iranian governments, on Twitter. The question now is whether he will do anything about it. The President responded decisively when Assad used chemical weapons last year. He should do so again, and demonstrate that Assad will pay a price for his war crimes.”

Sen. McCain has criticized former President Barack Obama in the past for his handling of the Syrian crisis. Obama even acknowledged that was one of his biggest regrets. It’s not customary for a senator to criticize his own party in such damning terms.

Reaction to Sen. McCain laying blame for Assad’s chemical attack at Donald Trump’s feet: