He did defeat them in Iraq/Syria after Barack Obama and Joe Biden allowed them to build a caliphate there. All those groups have one thing in common. They are all Islamist terrorists.
Spoken like a true brain dead liberal progressive. Instead of being afraid of antagonizing terrorists you tell their leadership that if we are attacked that we will target them personally just like we did that fucking Iranian general.
Withdrawal should have started in an orderly slow fashion months ago when we and the Afghan government still controlled the country. We should have never given up Bagram Air Base until all American civilians and Afghan refugees had been evacuated.