The Trump administration is reportedly weighing a proposal to send thousands of more troops to Afghanistan, an escalation of the longest war in U.S. history.

This would be a significant about-face from Trump’s public position in the years prior to his presidency. In 2015 he declared that invading Afghanistan in the first place was a “terrible mistake” and the current situation was “a mess,” although he added that “I would leave the troops there begrudgingly” because “that thing will collapse in about two seconds after they leave.”

Before running for president, Trump repeatedly tweeted about the need to end the war, referring to it as a waste of blood and treasure.