President Trump's advisers recruited two businessmen who profited from military contracting to devise alternatives to the Pentagon's plan to send thousands of additional troops to Afghanistan. Erik D. Prince, a founder of the private security firm Blackwater Worldwide, and Stephen A. Feinberg, a billionaire financier who owns the giant military contractor DynCorp International, have developed proposals to rely on contractors instead of American troops in Afghanistan at the behest of Stephen K. Bannon, Mr. Trump's chief strategist, and Jared Kushner, his senior adviser. Soliciting the views of Mr. Prince and Mr. Feinberg ... raises a host of ethical issues, not least that both men could profit from their recommendations. Mr. Feinberg ... met with the president on Afghanistan, according to an official, while Mr. Prince briefed several White House officials, including General McMaster. In an op-ed in The Wall Street Journal in May, [Mr. Prince] called on the White House ... to use "private military units" to fill the gaps left by departed American soldiers. If Mr. Trump opted to use more contractors and fewer troops, it could also enrich DynCorp, which has already been paid $2.5 billion by the State Department for its work in the country. Mr. Feinberg controls DynCorp through Cerberus Capital Management.