Former Afghanistan commander warns of plans to cut troops

The former top U.S. commander in Afghanistan says that withdrawing up to half the 14,000 American troops serving there reduces the incentive for the Taliban to negotiate

The U.S. and NATO formally concluded their combat mission in 2014, but American and allied troops remain, conducting strikes on the Islamic State group and the Taliban and working to train and build the Afghan military.

"If you tell the Taliban that we are absolutely leaving on date certain, cutting down, weakening ourselves, their incentives to try to cut a deal drop dramatically," McChrystal said on ABC's "This Week."

McChrystal also said he's worried that the Afghan people will lose confidence in the U.S. as an ally that can be counted on.

"I think we probably rocked them," said McChrystal, who commanded U.S. and NATO forces in Afghanistan for about a year.

He also was critical of President Donald Trump personally, saying he doesn't believe Trump tells the truth. The comment came when asked what he would say if he were asked to join the Trump administration.

"I think it's important for me to work for people who I think are basically honest, who tell the truth as best they know it," he said.

When asked if Trump is immoral, McChrystal responded: "I think he is."