Here are a Baker's Dozen worth of examples from Trump's Twitter feed:
We have wasted an enormous amount of blood and treasure in Afghanistan. Their government has zero appreciation. Let's get out!— Donald J. Trump (@realDonaldTrump) November 21, 2013
I agree with Pres. Obama on Afghanistan. We should have a speedy withdrawal. Why should we keep wasting our money -- rebuild the U.S.!— Donald J. Trump (@realDonaldTrump) January 14, 2013
84% of US troops wounded & 70% of our brave men & women killed in Afghanistan have all come under Obama. Time to get out of there.— Donald J. Trump (@realDonaldTrump) September 11, 2012
When will we stop wasting our money on rebuilding Afghanistan? We must rebuild our country first.— Donald J. Trump (@realDonaldTrump) October 7, 2011
Karzai of Afghanistan is not sticking with our signed agreement. They are dropping us like dopes. Get out now and re-build U.S.!— Donald J. Trump (@realDonaldTrump) December 6, 2012
It is time to get out of Afghanistan. We are building roads and schools for people that hate us. It is not in our national interests.— Donald J. Trump (@realDonaldTrump) February 27, 2012
Do not allow our very stupid leaders to sign a deal that keeps us in Afghanistan through 2024-with all costs by U.S.A. MAKE AMERICA GREAT!— Donald J. Trump (@realDonaldTrump) November 21, 2013
Why are we continuing to train these Afghanis who then shoot our soldiers in the back? Afghanistan is a complete waste. Time to come home!— Donald J. Trump (@realDonaldTrump) August 21, 2012
Let’s get out of Afghanistan. Our troops are being killed by the Afghanis we train and we waste billions there. Nonsense! Rebuild the USA.— Donald J. Trump (@realDonaldTrump) January 11, 2013
We should leave Afghanistan immediately. No more wasted lives. If we have to go back in, we go in hard & quick. Rebuild the US first.— Donald J. Trump (@realDonaldTrump) March 1, 2013
Ron Paul is right that we are wasting trillions of dollars in Iraq and Afghanistan.— Donald J. Trump (@realDonaldTrump) August 13, 2011
Now Obama is keeping our soldiers in Afghanistan for at least another year. He is losing two wars simultaneously.— Donald J. Trump (@realDonaldTrump) December 1, 2014
But here's the thing: This is actually not that much of a flip-flop from presidential candidate Donald Trump. Despite his penchant for making promises he couldn't keep, Trump actually acknowledged early in his 2016 campaign that he wouldn't immediately withdraw from Afghanistan if he became president. Trump occasionally referred to the money wasted in Afghanistan and talked about how the U.S. should mine it for minerals to recoup the costs of the war, but he basically abandoned the withdrawal talk early on.
“We made a terrible mistake getting involved there in the first place,” Trump told CNN in October 2015. “It's a mess. It's a mess, and at this point we probably have to because that thing will collapse in about two seconds after they leave. … I would leave the troops there begrudgingly. Believe me, I’m not happy about it.”
By March 6, 2016, he said at a debate in Detroit that “you have to stay in Afghanistan for a while, because of the fact that you're right next to Pakistan, which has nuclear weapons, and we have to protect that. Nuclear weapons change the game.”
That said, the apparent ramping up of the effort in Afghanistan is the latest example of a much bigger flip-flop for now-President Trump: a tonal and philosophical one. Despite his more cautious tone on Afghanistan as a candidate, this is a president who led us to believe — repeatedly — that he was a noninterventionist. He wanted to rebuild America first and get us out of foreign entanglements.
Instead, we have seen military strikes in Syria, an escalating series of threats with North Korea, an odd threat of military intervention in Venezuela, and now a slight ramping up of a war that Trump has long decried as a waste of lives and treasure.
The popularity of the Syria strikes and the circumstances that birthed them — its government using chemical weapons on its own people — obscured what a big flip-flop it was at the time and seemed to excuse that fact in people's minds. But what we've seen in the last few weeks makes clear this is not the dovish candidate we saw on the campaign trail; this is a president who will threaten and escalate when he sees the need to. And now that he's actually president, he's seeing plenty of need to.
In some ways, Trump's evolution on this mirrors that of his predecessor, Barack Obama, who promised to end the war in Afghanistan during his presidency and failed to deliver on it. Earlier in his presidency, Obama also signed off on a troop “surge.” It's really no surprise that a politician would see their preconceptions about foreign policy change upon inheriting the “commander in chief” title. (FiveThirtyEight notes this goes back much further than Obama.)
But on foreign policy, we are confronting perhaps the most serious and far-reaching flip-flop of Trump's presidency. It may not be a huge flip-flop on Afghanistan specifically, but it's the continuation of a huge one overall — especially considering the concerns people have about Trump's temperament and what it could lead to.