Joseph I. Lieberman: Trump could learn lesson from John McCain

FILE - In this Nov. 3, 2008, file photo, Republican presidential candidate Sen. John McCain, R-Ariz., speaks at a rally in Tampa, Fla. Aide says senator, war hero and GOP presidential candidate McCain died Saturday, Aug. 25, 2018. He was 81. (AP Photo/Carolyn Kaster, File) On one of the first foreign trips I took with John McCain, he handed me his comb and asked me to straighten out his hair. He could not raise his arms above his shoulders to comb his own hair, a lifelong consequence - and not the only one - of the abuse he suffered during his more than five years in a North Vietnamese prison.

Years later, I traveled to Hanoi with McCain and visited that prison, which is now a museum. A…